Sync with 2.4.0-test8 kernel.ati-4-1-1-20000919-stable

author: Gareth Hughes <gareth@users.sourceforge.net> 2000-09-10 16:16:41 +0000
committer: Gareth Hughes <gareth@users.sourceforge.net> 2000-09-10 16:16:41 +0000
commit: 83253109dc9400daece9111d9a832587ce3690ed (patch)
tree: b2e00dc30602554c500ddf53ca603d7eb3f8b252
parent: a5c98c730f6a865f0fb457103bfeb6dad5b82045 (diff)
39 files changed, 1576 insertions, 1303 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index b9a4dab4..fcee4104 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,16 +23,22 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
- * 
+ *
  */
 
 #ifndef _DRM_P_H_
 #define _DRM_P_H_
 
 #ifdef __KERNEL__
+#ifdef __alpha__
+/* add include of current.h so that "current" is defined
+ * before static inline funcs in wait.h. Doing this so we
+ * can build the DRM (part of PI DRI). 4/21/2000 S + B */
+#include <asm/current.h>
+#endif /* __alpha__ */
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -47,6 +53,9 @@
 #include <linux/sched.h>
 #include <linux/smp_lock.h>	/* For (un)lock_kernel */
 #include <linux/mm.h>
+#ifdef __alpha__
+#include <asm/pgtable.h> /* For pte_wrprotect */
+#endif
 #include <asm/io.h>
 #include <asm/mman.h>
 #include <asm/uaccess.h>
@@ -61,6 +70,9 @@
 #include <linux/tqueue.h>
 #include <linux/poll.h>
 #endif
+#if LINUX_VERSION_CODE < 0x020400
+#include "compat-pre24.h"
+#endif
 #include "drm.h"
 
 #define DRM_DEBUG_CODE 2	  /* Include debugging code (if > 1, then
@@ -140,15 +152,75 @@ typedef struct wait_queue *wait_queue_head_t;
 #define module_exit(x)  void cleanup_module(void) { x(); }
 #endif
 
-				/* virt_to_page added in 2.4.0-test6 */
-#if LINUX_VERSION_CODE < 0x020400
-#define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr))
-#endif
-
 				/* Generic cmpxchg added in 2.3.x */
 #ifndef __HAVE_ARCH_CMPXCHG
 				/* Include this here so that driver can be
                                    used with older kernels. */
+#if defined(__alpha__)
+static __inline__ unsigned long
+__cmpxchg_u32(volatile int *m, int old, int new)
+{
+	unsigned long prev, cmp;
+
+	__asm__ __volatile__(
+	"1:	ldl_l %0,%2\n"
+	"	cmpeq %0,%3,%1\n"
+	"	beq %1,2f\n"
+	"	mov %4,%1\n"
+	"	stl_c %1,%2\n"
+	"	beq %1,3f\n"
+	"2:	mb\n"
+	".subsection 2\n"
+	"3:	br 1b\n"
+	".previous"
+	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
+	: "r"((long) old), "r"(new), "m"(*m));
+
+	return prev;
+}
+
+static __inline__ unsigned long
+__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
+{
+	unsigned long prev, cmp;
+
+	__asm__ __volatile__(
+	"1:	ldq_l %0,%2\n"
+	"	cmpeq %0,%3,%1\n"
+	"	beq %1,2f\n"
+	"	mov %4,%1\n"
+	"	stq_c %1,%2\n"
+	"	beq %1,3f\n"
+	"2:	mb\n"
+	".subsection 2\n"
+	"3:	br 1b\n"
+	".previous"
+	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
+	: "r"((long) old), "r"(new), "m"(*m));
+
+	return prev;
+}
+
+static __inline__ unsigned long
+__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
+{
+	switch (size) {
+		case 4:
+			return __cmpxchg_u32(ptr, old, new);
+		case 8:
+			return __cmpxchg_u64(ptr, old, new);
+	}
+	return old;
+}
+#define cmpxchg(ptr,o,n)						 \
+  ({									 \
+     __typeof__(*(ptr)) _o_ = (o);					 \
+     __typeof__(*(ptr)) _n_ = (n);					 \
+     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,		 \
+				    (unsigned long)_n_, sizeof(*(ptr))); \
+  })
+
+#elif __i386__
 static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 				      unsigned long new, int size)
 {
@@ -179,6 +251,7 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 #define cmpxchg(ptr,o,n)						\
   ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),		\
 				 (unsigned long)(n),sizeof(*(ptr))))
+#endif /* i386 & alpha */
 #endif
 
 				/* Macros to make printk easier */
@@ -231,7 +304,7 @@ typedef struct drm_ioctl_desc {
 
 typedef struct drm_devstate {
 	pid_t		  owner;	/* X server pid holding x_lock */
-	
+
 } drm_devstate_t;
 
 typedef struct drm_magic_entry {
@@ -292,14 +365,14 @@ typedef struct drm_buf {
 #define DRM_DMA_HISTOGRAM_NEXT(current)	 ((current)*10)
 typedef struct drm_histogram {
 	atomic_t	  total;
-	
+
 	atomic_t	  queued_to_dispatched[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  dispatched_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  completed_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
-	
+
 	atomic_t	  queued_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  queued_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
-	
+
 	atomic_t	  dma[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  schedule[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  ctx[DRM_DMA_HISTOGRAM_SLOTS];
@@ -323,7 +396,7 @@ typedef struct drm_freelist {
 	int		  initialized; /* Freelist in use		   */
 	atomic_t	  count;       /* Number of free buffers	   */
 	drm_buf_t	  *next;       /* End pointer			   */
-	
+
 	wait_queue_head_t waiting;     /* Processes waiting on free bufs   */
 	int		  low_mark;    /* Low water mark		   */
 	int		  high_mark;   /* High water mark		   */
@@ -388,7 +461,7 @@ typedef struct drm_device_dma {
 	atomic_t	  total_prio;	/* Total DRM_DMA_PRIORITY	   */
 	atomic_t	  total_bytes;	/* Total bytes DMA'd		   */
 	atomic_t	  total_dmas;	/* Total DMA buffers dispatched	   */
-	
+
 	atomic_t	  total_missed_dma;  /* Missed drm_do_dma	    */
 	atomic_t	  total_missed_lock; /* Missed lock in drm_do_dma   */
 	atomic_t	  total_missed_free; /* Missed drm_free_this_buffer */
@@ -401,7 +474,7 @@ typedef struct drm_device_dma {
 	drm_buf_entry_t	  bufs[DRM_MAX_ORDER+1];
 	int		  buf_count;
 	drm_buf_t	  **buflist;	/* Vector of pointers info bufs	   */
-	int		  seg_count; 
+	int		  seg_count;
 	int		  page_count;
 	unsigned long	  *pagelist;
 	unsigned long	  byte_count;
@@ -462,7 +535,7 @@ typedef struct drm_device {
 	int		  unique_len;	/* Length of unique field	   */
 	dev_t		  device;	/* Device number for mknod	   */
 	char		  *devname;	/* For /proc/interrupts		   */
-	
+
 	int		  blocked;	/* Blocked due to VC switch?	   */
 	struct proc_dir_entry *root;	/* Root for this device's entries  */
 
@@ -483,7 +556,7 @@ typedef struct drm_device {
 	atomic_t	  total_ioctl;
 	atomic_t	  total_irq;	/* Total interruptions		   */
 	atomic_t	  total_ctx;	/* Total context switches	   */
-	
+
 	atomic_t	  total_locks;
 	atomic_t	  total_unlocks;
 	atomic_t	  total_contends;
@@ -524,7 +597,7 @@ typedef struct drm_device {
 #if DRM_DMA_HISTOGRAM
 	drm_histogram_t	  histo;
 #endif
-	
+
 				/* Callback to X server for context switch
 				   and for heavy-handed reset. */
 	char		  buf[DRM_BSZ]; /* Output buffer		   */
@@ -534,7 +607,7 @@ typedef struct drm_device {
 	struct fasync_struct *buf_async;/* Processes waiting for SIGIO	   */
 	wait_queue_head_t buf_readers;	/* Processes waiting to read	   */
 	wait_queue_head_t buf_writers;	/* Processes waiting to ctx switch */
-	
+
 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
 	drm_agp_head_t    *agp;
 #endif
diff --git a/linux-core/i810_dma.c b/linux-core/i810_dma.c
index 5792bf39..a9f860cd 100644
--- a/linux-core/i810_dma.c
+++ b/linux-core/i810_dma.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -107,14 +107,14 @@ static drm_buf_t *i810_freelist_get(drm_device_t *dev)
    	drm_device_dma_t *dma = dev->dma;
 	int		 i;
    	int 		 used;
-   
+
 	/* Linear search might not be the best solution */
 
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 		/* In use is already a pointer */
-	   	used = cmpxchg(buf_priv->in_use, I810_BUF_FREE, 
+	   	used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
 			       I810_BUF_CLIENT);
 	   	if(used == I810_BUF_FREE) {
 			return buf;
@@ -131,14 +131,14 @@ static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
 {
    	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
    	int used;
-   
+
    	/* In use is already a pointer */
    	used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
    	if(used != I810_BUF_CLIENT) {
 	   	DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
 	   	return -EINVAL;
 	}
-   
+
    	return 0;
 }
 
@@ -166,10 +166,10 @@ int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 	dev_priv = dev->dev_private;
 	buf      = dev_priv->mmap_buffer;
 	buf_priv = buf->dev_private;
-   
+
 	vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 	vma->vm_file = filp;
-   
+
    	buf_priv->currently_mapped = I810_BUF_MAPPED;
 	unlock_kernel();
 
@@ -196,9 +196,9 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
 		old_fops = filp->f_op;
 		filp->f_op = &i810_buffer_fops;
 		dev_priv->mmap_buffer = buf;
-		buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total, 
+		buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 						    PROT_READ|PROT_WRITE,
-						    MAP_SHARED, 
+						    MAP_SHARED,
 						    buf->bus_address);
 		dev_priv->mmap_buffer = NULL;
    		filp->f_op = old_fops;
@@ -222,15 +222,15 @@ static int i810_unmap_buffer(drm_buf_t *buf)
 	int retcode = 0;
 
 	if(VM_DONTCOPY != 0) {
-		if(buf_priv->currently_mapped != I810_BUF_MAPPED) 
+		if(buf_priv->currently_mapped != I810_BUF_MAPPED)
 			return -EINVAL;
 		down(&current->mm->mmap_sem);
 #if LINUX_VERSION_CODE < 0x020399
-        	retcode = do_munmap((unsigned long)buf_priv->virtual, 
+        	retcode = do_munmap((unsigned long)buf_priv->virtual,
 				    (size_t) buf->total);
 #else
-        	retcode = do_munmap(current->mm, 
-				    (unsigned long)buf_priv->virtual, 
+        	retcode = do_munmap(current->mm,
+				    (unsigned long)buf_priv->virtual,
 				    (size_t) buf->total);
 #endif
    		up(&current->mm->mmap_sem);
@@ -241,7 +241,7 @@ static int i810_unmap_buffer(drm_buf_t *buf)
 	return retcode;
 }
 
-static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d, 
+static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 			       struct file *filp)
 {
 	drm_file_t	  *priv	  = filp->private_data;
@@ -255,16 +255,16 @@ static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 	   	DRM_DEBUG("%s retcode %d\n", __FUNCTION__, retcode);
 		goto out_get_buf;
 	}
-   
+
 	retcode = i810_map_buffer(buf, filp);
 	if(retcode) {
 		i810_freelist_put(dev, buf);
-	   	DRM_DEBUG("mapbuf failed in %s retcode %d\n", 
+	   	DRM_DEBUG("mapbuf failed in %s retcode %d\n",
 			  __FUNCTION__, retcode);
 	   	goto out_get_buf;
 	}
 	buf->pid     = priv->pid;
-	buf_priv = buf->dev_private;	
+	buf_priv = buf->dev_private;
 	d->granted = 1;
    	d->request_idx = buf->idx;
    	d->request_size = buf->total;
@@ -277,22 +277,22 @@ out_get_buf:
 static unsigned long i810_alloc_page(drm_device_t *dev)
 {
 	unsigned long address;
-   
+
 	address = __get_free_page(GFP_KERNEL);
-	if(address == 0UL) 
+	if(address == 0UL)
 		return 0;
-	
+
 	atomic_inc(&virt_to_page(address)->count);
 	set_bit(PG_locked, &virt_to_page(address)->flags);
-   
+
 	return address;
 }
 
 static void i810_free_page(drm_device_t *dev, unsigned long page)
 {
-	if(page == 0UL) 
+	if(page == 0UL)
 		return;
-	
+
 	atomic_dec(&virt_to_page(page)->count);
 	clear_bit(PG_locked, &virt_to_page(page)->flags);
 	wake_up(&virt_to_page(page)->wait);
@@ -306,9 +306,9 @@ static int i810_dma_cleanup(drm_device_t *dev)
 
 	if(dev->dev_private) {
 		int i;
-	   	drm_i810_private_t *dev_priv = 
+	   	drm_i810_private_t *dev_priv =
 	     		(drm_i810_private_t *) dev->dev_private;
-	   
+
 	   	if(dev_priv->ring.virtual_start) {
 		   	drm_ioremapfree((void *) dev_priv->ring.virtual_start,
 					dev_priv->ring.Size);
@@ -318,7 +318,7 @@ static int i810_dma_cleanup(drm_device_t *dev)
 		   	/* Need to rewrite hardware status page */
 		   	I810_WRITE(0x02080, 0x1ffff000);
 		}
-	   	drm_free(dev->dev_private, sizeof(drm_i810_private_t), 
+	   	drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 			 DRM_MEM_DRIVER);
 	   	dev->dev_private = NULL;
 
@@ -342,14 +342,14 @@ static int i810_wait_ring(drm_device_t *dev, int n)
 	end = jiffies + (HZ*3);
    	while (ring->space < n) {
 	   	int i;
-	
+
 	   	ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 	   	ring->space = ring->head - (ring->tail+8);
 		if (ring->space < 0) ring->space += ring->Size;
-	   
+
 		if (ring->head != last_head)
 		   end = jiffies + (HZ*3);
-	  
+
 	   	iters++;
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("space: %d wanted %d\n", ring->space, n);
@@ -360,7 +360,7 @@ static int i810_wait_ring(drm_device_t *dev, int n)
 	   	for (i = 0 ; i < 2000 ; i++) ;
 	}
 
-out_wait_ring:   
+out_wait_ring:
    	return iters;
 }
 
@@ -368,7 +368,7 @@ static void i810_kernel_lost_context(drm_device_t *dev)
 {
       	drm_i810_private_t *dev_priv = dev->dev_private;
    	drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
-      
+
    	ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
      	ring->tail = I810_READ(LP_RING + RING_TAIL);
      	ring->space = ring->head - (ring->tail+8);
@@ -382,7 +382,7 @@ static int i810_freelist_init(drm_device_t *dev)
    	int my_idx = 24;
    	u32 *hw_status = (u32 *)(dev_priv->hw_status_page + my_idx);
    	int i;
-   
+
    	if(dma->buf_count > 1019) {
 	   	/* Not enough space in the status page for the freelist */
 	   	return -EINVAL;
@@ -391,20 +391,20 @@ static int i810_freelist_init(drm_device_t *dev)
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
+
 	   	buf_priv->in_use = hw_status++;
 	   	buf_priv->my_use_idx = my_idx;
 	   	my_idx += 4;
 
 	   	*buf_priv->in_use = I810_BUF_FREE;
 
-		buf_priv->kernel_virtual = drm_ioremap(buf->bus_address, 
+		buf_priv->kernel_virtual = drm_ioremap(buf->bus_address,
 						       buf->total);
 	}
 	return 0;
 }
 
-static int i810_dma_initialize(drm_device_t *dev, 
+static int i810_dma_initialize(drm_device_t *dev,
 			       drm_i810_private_t *dev_priv,
 			       drm_i810_init_t *init)
 {
@@ -419,27 +419,27 @@ static int i810_dma_initialize(drm_device_t *dev,
 	   	DRM_ERROR("ring_map or buffer_map are invalid\n");
 	   	return -EINVAL;
 	}
-   
+
    	dev_priv->ring_map_idx = init->ring_map_idx;
    	dev_priv->buffer_map_idx = init->buffer_map_idx;
 	sarea_map = dev->maplist[0];
-	dev_priv->sarea_priv = (drm_i810_sarea_t *) 
-		((u8 *)sarea_map->handle + 
+	dev_priv->sarea_priv = (drm_i810_sarea_t *)
+		((u8 *)sarea_map->handle +
 		 init->sarea_priv_offset);
 
    	atomic_set(&dev_priv->flush_done, 0);
 	init_waitqueue_head(&dev_priv->flush_queue);
-   	
+
    	dev_priv->ring.Start = init->ring_start;
    	dev_priv->ring.End = init->ring_end;
    	dev_priv->ring.Size = init->ring_size;
 
-   	dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base + 
-						   init->ring_start, 
+   	dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base +
+						   init->ring_start,
 						   init->ring_size);
 
    	dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
-   
+
    	if (dev_priv->ring.virtual_start == NULL) {
 	   	i810_dma_cleanup(dev);
 	   	DRM_ERROR("can not ioremap virtual address for"
@@ -456,8 +456,8 @@ static int i810_dma_initialize(drm_device_t *dev,
 	dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 	dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 	dev_priv->zi1 = init->depth_offset | init->pitch_bits;
-	
-   
+
+
    	/* Program Hardware Status Page */
    	dev_priv->hw_status_page = i810_alloc_page(dev);
    	memset((void *) dev_priv->hw_status_page, 0, PAGE_SIZE);
@@ -467,10 +467,10 @@ static int i810_dma_initialize(drm_device_t *dev,
 		return -ENOMEM;
 	}
    	DRM_DEBUG("hw status page @ %lx\n", dev_priv->hw_status_page);
-   
+
    	I810_WRITE(0x02080, virt_to_bus((void *)dev_priv->hw_status_page));
    	DRM_DEBUG("Enabled hardware status page\n");
-   
+
    	/* Now we need to init our freelist */
    	if(i810_freelist_init(dev) != 0) {
 	   	i810_dma_cleanup(dev);
@@ -489,13 +489,13 @@ int i810_dma_init(struct inode *inode, struct file *filp,
    	drm_i810_private_t *dev_priv;
    	drm_i810_init_t init;
    	int retcode = 0;
-	
-   	copy_from_user_ret(&init, (drm_i810_init_t *)arg, 
-			   sizeof(init), -EFAULT);
-	
+
+  	if (copy_from_user(&init, (drm_i810_init_t *)arg, sizeof(init)))
+		return -EFAULT;
+
    	switch(init.func) {
 	 	case I810_INIT_DMA:
-	   		dev_priv = drm_alloc(sizeof(drm_i810_private_t), 
+	   		dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 					     DRM_MEM_DRIVER);
 	   		if(dev_priv == NULL) return -ENOMEM;
 	   		retcode = i810_dma_initialize(dev, dev_priv, &init);
@@ -507,7 +507,7 @@ int i810_dma_init(struct inode *inode, struct file *filp,
 	   		retcode = -EINVAL;
 	   	break;
 	}
-   
+
    	return retcode;
 }
 
@@ -519,9 +519,9 @@ int i810_dma_init(struct inode *inode, struct file *filp,
  * Use 'volatile' & local var tmp to force the emitted values to be
  * identical to the verified ones.
  */
-static void i810EmitContextVerified( drm_device_t *dev, 
-				     volatile unsigned int *code ) 
-{	
+static void i810EmitContextVerified( drm_device_t *dev,
+				     volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
 	unsigned int tmp;
@@ -539,22 +539,22 @@ static void i810EmitContextVerified( drm_device_t *dev,
 		tmp = code[i];
 
 		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24)) 
+		    (tmp & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp ); 
+			OUT_RING( tmp );
 			j++;
-		} 
+		}
 	}
 
-	if (j & 1) 
-		OUT_RING( 0 ); 
+	if (j & 1)
+		OUT_RING( 0 );
 
 	ADVANCE_LP_RING();
 }
 
-static void i810EmitTexVerified( drm_device_t *dev, 
-				 volatile unsigned int *code ) 
-{	
+static void i810EmitTexVerified( drm_device_t *dev,
+				 volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
 	unsigned int tmp;
@@ -571,15 +571,15 @@ static void i810EmitTexVerified( drm_device_t *dev,
 		tmp = code[i];
 
 		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24)) 
+		    (tmp & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp ); 
+			OUT_RING( tmp );
 			j++;
 		}
-	} 
-		
-	if (j & 1) 
-		OUT_RING( 0 ); 
+	}
+
+	if (j & 1)
+		OUT_RING( 0 );
 
 	ADVANCE_LP_RING();
 }
@@ -587,9 +587,9 @@ static void i810EmitTexVerified( drm_device_t *dev,
 
 /* Need to do some additional checking when setting the dest buffer.
  */
-static void i810EmitDestVerified( drm_device_t *dev, 
-				  volatile unsigned int *code ) 
-{	
+static void i810EmitDestVerified( drm_device_t *dev,
+				  volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	unsigned int tmp;
 	RING_LOCALS;
@@ -653,9 +653,9 @@ static void i810EmitState( drm_device_t *dev )
 
 
 
-/* need to verify 
+/* need to verify
  */
-static void i810_dma_dispatch_clear( drm_device_t *dev, int flags, 
+static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 				     unsigned int clear_color,
 				     unsigned int clear_zval )
 {
@@ -686,10 +686,10 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 		    pbox->y2 > dev_priv->h)
 			continue;
 
-	   	if ( flags & I810_FRONT ) {	    
+	   	if ( flags & I810_FRONT ) {
 		   	DRM_DEBUG("clear front\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -701,8 +701,8 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 
 		if ( flags & I810_BACK ) {
 			DRM_DEBUG("clear back\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -714,8 +714,8 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 
 		if ( flags & I810_DEPTH ) {
 			DRM_DEBUG("clear depth\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -746,7 +746,7 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
       	if (nbox > I810_NR_SAREA_CLIPRECTS)
      		nbox = I810_NR_SAREA_CLIPRECTS;
 
-	for (i = 0 ; i < nbox; i++, pbox++) 
+	for (i = 0 ; i < nbox; i++, pbox++)
 	{
 		unsigned int w = pbox->x2 - pbox->x1;
 		unsigned int h = pbox->y2 - pbox->y1;
@@ -758,7 +758,7 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 		    pbox->x2 > dev_priv->w ||
 		    pbox->y2 > dev_priv->h)
 			continue;
- 
+
 	   	DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
 			  pbox[i].x1, pbox[i].y1,
 			  pbox[i].x2, pbox[i].y2);
@@ -768,14 +768,14 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 		OUT_RING( pitch | (0xCC << 16));
 		OUT_RING( (h << 16) | (w * cpp));
 		OUT_RING( dst );
-		OUT_RING( pitch );	
+		OUT_RING( pitch );
 		OUT_RING( start );
 		ADVANCE_LP_RING();
 	}
 }
 
 
-static void i810_dma_dispatch_vertex(drm_device_t *dev, 
+static void i810_dma_dispatch_vertex(drm_device_t *dev,
 				     drm_buf_t *buf,
 				     int discard,
 				     int used)
@@ -786,30 +786,30 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
    	drm_clip_rect_t *box = sarea_priv->boxes;
    	int nbox = sarea_priv->nbox;
 	unsigned long address = (unsigned long)buf->bus_address;
-	unsigned long start = address - dev->agp->base;     
+	unsigned long start = address - dev->agp->base;
 	int i = 0, u;
    	RING_LOCALS;
 
    	i810_kernel_lost_context(dev);
 
-   	if (nbox > I810_NR_SAREA_CLIPRECTS) 
+   	if (nbox > I810_NR_SAREA_CLIPRECTS)
 		nbox = I810_NR_SAREA_CLIPRECTS;
 
 	if (discard) {
-		u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, 
+		u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 			    I810_BUF_HARDWARE);
 		if(u != I810_BUF_CLIENT) {
 			DRM_DEBUG("xxxx 2\n");
 		}
 	}
 
-	if (used > 4*1024) 
+	if (used > 4*1024)
 		used = 0;
 
 	if (sarea_priv->dirty)
 	   i810EmitState( dev );
 
-  	DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n", 
+  	DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
 		  address, used, nbox);
 
    	dev_priv->counter++;
@@ -823,7 +823,7 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
 		*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE |
 					     sarea_priv->vertex_prim |
 					     ((used/4)-2));
-		
+
 		if (used & 4) {
 			*(u32 *)((u32)buf_priv->virtual + used) = 0;
 			used += 4;
@@ -831,26 +831,26 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
 
 		i810_unmap_buffer(buf);
 	}
-		   
+
 	if (used) {
 		do {
 			if (i < nbox) {
 				BEGIN_LP_RING(4);
-				OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR | 
+				OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 					  SC_ENABLE );
 				OUT_RING( GFX_OP_SCISSOR_INFO );
 				OUT_RING( box[i].x1 | (box[i].y1<<16) );
 				OUT_RING( (box[i].x2-1) | ((box[i].y2-1)<<16) );
 				ADVANCE_LP_RING();
 			}
-			
+
 			BEGIN_LP_RING(4);
 			OUT_RING( CMD_OP_BATCH_BUFFER );
 			OUT_RING( start | BB1_PROTECTED );
 			OUT_RING( start + used - 4 );
 			OUT_RING( 0 );
 			ADVANCE_LP_RING();
-			
+
 		} while (++i < nbox);
 	}
 
@@ -878,15 +878,15 @@ static void i810_dma_service(int irq, void *device, struct pt_regs *regs)
 {
 	drm_device_t	 *dev = (drm_device_t *)device;
    	u16 temp;
-   
+
 	atomic_inc(&dev->total_irq);
       	temp = I810_READ16(I810REG_INT_IDENTITY_R);
    	temp = temp & ~(0x6000);
-   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R, 
+   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
 				   temp); /* Clear all interrupts */
 	else
 	   return;
- 
+
    	queue_task(&dev->tq, &tq_immediate);
    	mark_bh(IMMEDIATE_BH);
 }
@@ -904,9 +904,9 @@ int i810_irq_install(drm_device_t *dev, int irq)
 {
 	int retcode;
 	u16 temp;
-   
+
 	if (!irq)     return -EINVAL;
-	
+
 	down(&dev->struct_sem);
 	if (dev->irq) {
 		up(&dev->struct_sem);
@@ -914,14 +914,14 @@ int i810_irq_install(drm_device_t *dev, int irq)
 	}
 	dev->irq = irq;
 	up(&dev->struct_sem);
-	
+
    	DRM_DEBUG(  "Interrupt Install : %d\n", irq);
 	DRM_DEBUG("%d\n", irq);
 
 	dev->context_flag     = 0;
 	dev->interrupt_flag   = 0;
 	dev->dma_flag	      = 0;
-	
+
 	dev->dma->next_buffer = NULL;
 	dev->dma->next_queue  = NULL;
 	dev->dma->this_buffer = NULL;
@@ -935,7 +935,7 @@ int i810_irq_install(drm_device_t *dev, int irq)
    	temp = I810_READ16(I810REG_HWSTAM);
    	temp = temp & 0x6000;
    	I810_WRITE16(I810REG_HWSTAM, temp);
-   	
+
       	temp = I810_READ16(I810REG_INT_MASK_R);
    	temp = temp & 0x6000;
    	I810_WRITE16(I810REG_INT_MASK_R, temp); /* Unmask interrupts */
@@ -957,7 +957,7 @@ int i810_irq_install(drm_device_t *dev, int irq)
    	temp = I810_READ16(I810REG_INT_ENABLE_R);
    	temp = temp & 0x6000;
    	temp = temp | 0x0003;
-   	I810_WRITE16(I810REG_INT_ENABLE_R, 
+   	I810_WRITE16(I810REG_INT_ENABLE_R,
 		     temp); /* Enable bp & user interrupts */
 	return 0;
 }
@@ -974,20 +974,20 @@ int i810_irq_uninstall(drm_device_t *dev)
 	irq	 = dev->irq;
 	dev->irq = 0;
 	up(&dev->struct_sem);
-	
+
 	if (!irq) return -EINVAL;
 
-   	DRM_DEBUG(  "Interrupt UnInstall: %d\n", irq);	
+   	DRM_DEBUG(  "Interrupt UnInstall: %d\n", irq);
 	DRM_DEBUG("%d\n", irq);
-   
+
    	temp = I810_READ16(I810REG_INT_IDENTITY_R);
    	temp = temp & ~(0x6000);
-   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R, 
+   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
 				   temp); /* Clear all interrupts */
-   
+
    	temp = I810_READ16(I810REG_INT_ENABLE_R);
    	temp = temp & 0x6000;
-   	I810_WRITE16(I810REG_INT_ENABLE_R, 
+   	I810_WRITE16(I810REG_INT_ENABLE_R,
 		     temp);                     /* Disable all interrupts */
 
    	free_irq(irq, dev);
@@ -1002,11 +1002,12 @@ int i810_control(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_control_t	ctl;
 	int		retcode;
-   
+
    	DRM_DEBUG(  "i810_control\n");
 
-	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
-	
+	if (copy_from_user(&ctl, (drm_control_t *)arg, sizeof(ctl)))
+		return -EFAULT;
+
 	switch (ctl.func) {
 	case DRM_INST_HANDLER:
 		if ((retcode = i810_irq_install(dev, ctl.irq)))
@@ -1062,7 +1063,7 @@ static void i810_dma_quiescent(drm_device_t *dev)
 {
       	DECLARE_WAITQUEUE(entry, current);
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-	unsigned long end;      
+	unsigned long end;
 
    	if(dev_priv == NULL) {
 	   	return;
@@ -1071,23 +1072,23 @@ static void i810_dma_quiescent(drm_device_t *dev)
    	current->state = TASK_INTERRUPTIBLE;
    	add_wait_queue(&dev_priv->flush_queue, &entry);
    	end = jiffies + (HZ*3);
-   
+
    	for (;;) {
 	      	i810_dma_quiescent_emit(dev);
 	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("lockup\n");
 		   	break;
-		}	   
+		}
 	      	schedule_timeout(HZ*3);
 	      	if (signal_pending(current)) {
 		   	break;
 		}
 	}
-   
+
    	current->state = TASK_RUNNING;
    	remove_wait_queue(&dev_priv->flush_queue, &entry);
-   
+
    	return;
 }
 
@@ -1097,7 +1098,7 @@ static int i810_flush_queue(drm_device_t *dev)
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
 	drm_device_dma_t *dma = dev->dma;
 	unsigned long end;
-   	int i, ret = 0;      
+   	int i, ret = 0;
 
    	if(dev_priv == NULL) {
 	   	return 0;
@@ -1112,14 +1113,14 @@ static int i810_flush_queue(drm_device_t *dev)
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("lockup\n");
 		   	break;
-		}	   
+		}
 	      	schedule_timeout(HZ*3);
 	      	if (signal_pending(current)) {
 		   	ret = -EINTR; /* Can't restart */
 		   	break;
 		}
 	}
-   
+
    	current->state = TASK_RUNNING;
    	remove_wait_queue(&dev_priv->flush_queue, &entry);
 
@@ -1127,8 +1128,8 @@ static int i810_flush_queue(drm_device_t *dev)
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
-		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE, 
+
+		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 				   I810_BUF_FREE);
 
 		if (used == I810_BUF_HARDWARE)
@@ -1155,9 +1156,9 @@ void i810_reclaim_buffers(drm_device_t *dev, pid_t pid)
 	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
+
 		if (buf->pid == pid && buf_priv) {
-			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, 
+			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 					   I810_BUF_FREE);
 
 			if (used == I810_BUF_CLIENT)
@@ -1178,14 +1179,15 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		  ret	= 0;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
 		return -EINVAL;
 	}
-   
+
    	DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
 		  lock.context, current->pid, dev->lock.hw_lock->lock,
 		  lock.flags);
@@ -1211,7 +1213,7 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
 			}
-			
+
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -1225,9 +1227,8 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->state = TASK_RUNNING;
 		remove_wait_queue(&dev->lock.lock_queue, &entry);
 	}
-	
+
 	if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -1236,7 +1237,7 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
 		if (lock.flags & _DRM_LOCK_QUIESCENT) {
 		   DRM_DEBUG("_DRM_LOCK_QUIESCENT\n");
 		   DRM_DEBUG("fred\n");
@@ -1247,12 +1248,12 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	return ret;
 }
 
-int i810_flush_ioctl(struct inode *inode, struct file *filp, 
+int i810_flush_ioctl(struct inode *inode, struct file *filp,
 		     unsigned int cmd, unsigned long arg)
 {
    	drm_file_t	  *priv	  = filp->private_data;
    	drm_device_t	  *dev	  = priv->dev;
-   
+
    	DRM_DEBUG("i810_flush_ioctl\n");
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_flush_ioctl called without lock held\n");
@@ -1272,12 +1273,12 @@ int i810_dma_vertex(struct inode *inode, struct file *filp,
 	drm_device_dma_t *dma = dev->dma;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
       	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 	drm_i810_vertex_t vertex;
 
-	copy_from_user_ret(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex),
-			   -EFAULT);
+	if (copy_from_user(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex)))
+		return -EFAULT;
 
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_dma_vertex called without lock held\n");
@@ -1287,15 +1288,15 @@ int i810_dma_vertex(struct inode *inode, struct file *filp,
 	DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
 		  vertex.idx, vertex.used, vertex.discard);
 
-	i810_dma_dispatch_vertex( dev, 
-				  dma->buflist[ vertex.idx ], 
+	i810_dma_dispatch_vertex( dev,
+				  dma->buflist[ vertex.idx ],
 				  vertex.discard, vertex.used );
 
    	atomic_add(vertex.used, &dma->total_bytes);
 	atomic_inc(&dma->total_dmas);
 	sarea_priv->last_enqueue = dev_priv->counter-1;
    	sarea_priv->last_dispatch = (int) hw_status[5];
-   
+
 	return 0;
 }
 
@@ -1308,16 +1309,16 @@ int i810_clear_bufs(struct inode *inode, struct file *filp,
 	drm_device_t *dev = priv->dev;
 	drm_i810_clear_t clear;
 
-   	copy_from_user_ret(&clear, (drm_i810_clear_t *)arg, sizeof(clear), 
-			   -EFAULT);
-   
+   	if (copy_from_user(&clear, (drm_i810_clear_t *)arg, sizeof(clear)))
+		return -EFAULT;
+
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_clear_bufs called without lock held\n");
 		return -EINVAL;
 	}
 
-	i810_dma_dispatch_clear( dev, clear.flags, 
-				 clear.clear_color, 
+	i810_dma_dispatch_clear( dev, clear.flags,
+				 clear.clear_color,
 				 clear.clear_depth );
    	return 0;
 }
@@ -1327,7 +1328,7 @@ int i810_swap_bufs(struct inode *inode, struct file *filp,
 {
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev = priv->dev;
-   
+
 	DRM_DEBUG("i810_swap_bufs\n");
 
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
@@ -1346,8 +1347,8 @@ int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	    = priv->dev;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
       	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 
       	sarea_priv->last_dispatch = (int) hw_status[5];
 	return 0;
@@ -1362,17 +1363,18 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_i810_dma_t	  d;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
    	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 
 	DRM_DEBUG("getbuf\n");
-   	copy_from_user_ret(&d, (drm_i810_dma_t *)arg, sizeof(d), -EFAULT);
-   
+   	if (copy_from_user(&d, (drm_i810_dma_t *)arg, sizeof(d)))
+		return -EFAULT;
+
 	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_dma called without lock held\n");
 		return -EINVAL;
 	}
-	
+
 	d.granted = 0;
 
 	retcode = i810_dma_get_buffer(dev, &d, filp);
@@ -1380,7 +1382,8 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
 		  current->pid, retcode, d.granted);
 
-	copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);   
+	if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
+		return -EFAULT;
    	sarea_priv->last_dispatch = (int) hw_status[5];
 
 	return retcode;
@@ -1394,8 +1397,8 @@ int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_i810_copy_t	  d;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
    	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 	drm_buf_t *buf;
 	drm_i810_buf_priv_t *buf_priv;
 	drm_device_dma_t *dma = dev->dma;
@@ -1404,15 +1407,17 @@ int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
 		DRM_ERROR("i810_dma called without lock held\n");
 		return -EINVAL;
 	}
-   
-   	copy_from_user_ret(&d, (drm_i810_copy_t *)arg, sizeof(d), -EFAULT);
+
+   	if (copy_from_user(&d, (drm_i810_copy_t *)arg, sizeof(d)))
+		return -EFAULT;
 
 	if(d.idx > dma->buf_count) return -EINVAL;
 	buf = dma->buflist[ d.idx ];
    	buf_priv = buf->dev_private;
 	if (buf_priv->currently_mapped != I810_BUF_MAPPED) return -EPERM;
 
-   	copy_from_user_ret(buf_priv->virtual, d.address, d.used, -EFAULT);
+   	if (copy_from_user(buf_priv->virtual, d.address, d.used))
+		return -EFAULT;
 
    	sarea_priv->last_dispatch = (int) hw_status[5];
 
diff --git a/linux-core/i810_drv.c b/linux-core/i810_drv.c
index 18168605..86d5e230 100644
--- a/linux-core/i810_drv.c
+++ b/linux-core/i810_drv.c
@@ -1,6 +1,6 @@
 /* i810_drv.c -- I810 driver -*- linux-c -*-
  * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
- * 
+ *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -35,7 +35,7 @@
 
 #define I810_NAME	 "i810"
 #define I810_DESC	 "Intel I810"
-#define I810_DATE	 "20000719"
+#define I810_DATE	 "20000910"
 #define I810_MAJOR	 1
 #define I810_MINOR	 1
 #define I810_PATCHLEVEL	 0
@@ -143,7 +143,7 @@ __setup("i810=", i810_options);
 static int i810_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -188,22 +188,22 @@ static int i810_setup(drm_device_t *dev)
 #endif
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
 	dev->buf_async	  = NULL;
 	init_waitqueue_head(&dev->buf_readers);
 	init_waitqueue_head(&dev->buf_writers);
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -218,15 +218,15 @@ static int i810_takedown(drm_device_t *dev)
 	DRM_DEBUG("\n");
 
 	if (dev->irq) i810_irq_uninstall(dev);
-	
+
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -244,7 +244,7 @@ static int i810_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until r128_cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -254,10 +254,10 @@ static int i810_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
 	}
@@ -269,7 +269,7 @@ static int i810_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -305,7 +305,7 @@ static int i810_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->queuelist) {
 		for (i = 0; i < dev->queue_count; i++) {
 			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
@@ -331,7 +331,7 @@ static int i810_takedown(drm_device_t *dev)
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -348,7 +348,7 @@ static int i810_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(i810);
 #endif
@@ -402,7 +402,7 @@ static void i810_cleanup(void)
 	drm_device_t	      *dev = &i810_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&i810_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -428,17 +428,18 @@ int i810_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))          \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = I810_MAJOR;
@@ -449,10 +450,10 @@ int i810_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, I810_DATE);
 	DRM_COPY(version.desc, I810_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -460,7 +461,7 @@ int i810_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &i810_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -497,7 +498,7 @@ int i810_release(struct inode *inode, struct file *filp)
 		drm_lock_free(dev,
 			      &dev->lock.hw_lock->lock,
 			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		
+
 				/* FIXME: may require heavy-handed reset of
                                    hardware at this point, possibly
                                    processed via a callback to the X
@@ -518,7 +519,7 @@ int i810_release(struct inode *inode, struct file *filp)
 				dev->lock.lock_time = jiffies;
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
-			}			
+			}
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -544,7 +545,7 @@ int i810_release(struct inode *inode, struct file *filp)
 	if (priv->next) priv->next->prev = priv->prev;
 	else		dev->file_last	 = priv->prev;
 	up(&dev->struct_sem);
-	
+
 	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
 #if LINUX_VERSION_CODE < 0x020333
 	MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
@@ -584,7 +585,7 @@ int i810_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -604,7 +605,7 @@ int i810_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -616,8 +617,9 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -641,9 +643,7 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->histo.lhld[drm_histogram_slot(get_cycles()
 						       - dev->lck_start)]);
 #endif
-	
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux-core/mga_drv.c b/linux-core/mga_drv.c
index a4a8fe55..c551ba6e 100644
--- a/linux-core/mga_drv.c
+++ b/linux-core/mga_drv.c
@@ -1,6 +1,6 @@
 /* mga_drv.c -- Matrox g200/g400 driver -*- linux-c -*-
  * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
- * 
+ *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -35,9 +35,9 @@
 #include "mga_drv.h"
 
 #define MGA_NAME	 "mga"
-#define MGA_DESC	 "Matrox g200/g400"
-#define MGA_DATE	 "20000719"
-#define MGA_MAJOR	 1
+#define MGA_DESC	 "Matrox G200/G400"
+#define MGA_DATE	 "20000910"
+#define MGA_MAJOR	 2
 #define MGA_MINOR	 0
 #define MGA_PATCHLEVEL	 0
 
@@ -123,7 +123,7 @@ static char		      *mga = NULL;
 #endif
 
 MODULE_AUTHOR("VA Linux Systems, Inc.");
-MODULE_DESCRIPTION("Matrox g200/g400");
+MODULE_DESCRIPTION("Matrox G200/G400");
 MODULE_PARM(mga, "s");
 
 #ifndef MODULE
@@ -144,7 +144,7 @@ __setup("mga=", mga_options);
 static int mga_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -187,22 +187,22 @@ static int mga_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
 	dev->buf_async	  = NULL;
 	init_waitqueue_head(&dev->buf_readers);
 	init_waitqueue_head(&dev->buf_writers);
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -217,15 +217,15 @@ static int mga_takedown(drm_device_t *dev)
 	DRM_DEBUG("\n");
 
 	if (dev->irq) mga_irq_uninstall(dev);
-	
+
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -243,7 +243,7 @@ static int mga_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -253,10 +253,10 @@ static int mga_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
 	}
@@ -268,7 +268,7 @@ static int mga_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -304,7 +304,7 @@ static int mga_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->queuelist) {
 		for (i = 0; i < dev->queue_count; i++) {
 			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
@@ -330,7 +330,7 @@ static int mga_takedown(drm_device_t *dev)
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -347,7 +347,7 @@ static int mga_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(mga);
 #endif
@@ -407,7 +407,7 @@ static void mga_cleanup(void)
 	drm_device_t	      *dev = &mga_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&mga_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -419,7 +419,7 @@ static void mga_cleanup(void)
 #ifdef CONFIG_MTRR
    	if(dev->agp && dev->agp->agp_mtrr) {
 	   	int retval;
-	   	retval = mtrr_del(dev->agp->agp_mtrr, 
+	   	retval = mtrr_del(dev->agp->agp_mtrr,
 				  dev->agp->agp_info.aper_base,
 				  dev->agp->agp_info.aper_size * 1024*1024);
 	   	DRM_DEBUG("mtrr_del = %d\n", retval);
@@ -444,17 +444,18 @@ int mga_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = MGA_MAJOR;
@@ -465,10 +466,10 @@ int mga_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, MGA_DATE);
 	DRM_COPY(version.desc, MGA_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -476,7 +477,7 @@ int mga_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &mga_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -513,7 +514,7 @@ int mga_release(struct inode *inode, struct file *filp)
 		drm_lock_free(dev,
 			      &dev->lock.hw_lock->lock,
 			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		
+
 				/* FIXME: may require heavy-handed reset of
                                    hardware at this point, possibly
                                    processed via a callback to the X
@@ -534,7 +535,7 @@ int mga_release(struct inode *inode, struct file *filp)
 				dev->lock.lock_time = jiffies;
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
-			}			
+			}
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -560,7 +561,7 @@ int mga_release(struct inode *inode, struct file *filp)
 	if (priv->next) priv->next->prev = priv->prev;
 	else		dev->file_last	 = priv->prev;
 	up(&dev->struct_sem);
-	
+
 	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
 #if LINUX_VERSION_CODE < 0x020333
 	MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
@@ -601,7 +602,7 @@ int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -621,7 +622,7 @@ int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -633,8 +634,9 @@ int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -655,8 +657,6 @@ int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	   DRM_ERROR("\n");
 	}
 
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux-core/r128_drv.c b/linux-core/r128_drv.c
index dd982ab4..b58dcf06 100644
--- a/linux-core/r128_drv.c
+++ b/linux-core/r128_drv.c
@@ -35,7 +35,7 @@
 
 #define R128_NAME	 "r128"
 #define R128_DESC	 "ATI Rage 128"
-#define R128_DATE	 "20000827"
+#define R128_DATE	 "20000910"
 #define R128_MAJOR	 1
 #define R128_MINOR	 0
 #define R128_PATCHLEVEL  0
@@ -420,17 +420,18 @@ int r128_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = R128_MAJOR;
@@ -441,10 +442,10 @@ int r128_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, R128_DATE);
 	DRM_COPY(version.desc, R128_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -559,7 +560,8 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         dev->lck_start = start = get_cycles();
 #endif
 
-        copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+        if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
         if (lock.context == DRM_KERNEL_CONTEXT) {
                 DRM_ERROR("Process %d using kernel context %d\n",
@@ -656,7 +658,6 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -665,7 +666,6 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -700,7 +700,8 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
@@ -729,9 +730,6 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->priority = DEF_PRIORITY;
 	}
 #endif
-
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux-core/sis_drv.c b/linux-core/sis_drv.c
index 434a1ccd..d5fe8fc0 100644
--- a/linux-core/sis_drv.c
+++ b/linux-core/sis_drv.c
@@ -9,11 +9,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -100,7 +100,7 @@ static drm_ioctl_desc_t	      sis_ioctls[] = {
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_INIT)]   = { sis_agp_init,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_ALLOC)]  = { sis_agp_alloc,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_FREE)]   = { sis_agp_free,	  1, 1 },
-        
+
 #if defined(SIS_STEREO)
 	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]    = { sis_control,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_FLIP)]       = { sis_flip,	  1, 1 },
@@ -121,7 +121,7 @@ MODULE_PARM(sis, "s");
 static int sis_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -163,7 +163,7 @@ static int sis_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
@@ -172,15 +172,15 @@ static int sis_setup(drm_device_t *dev)
 	init_waitqueue_head(&dev->buf_writers);
 
 	sis_res_ctx.handle=-1;
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -200,12 +200,12 @@ static int sis_takedown(drm_device_t *dev)
 
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -224,7 +224,7 @@ static int sis_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -234,13 +234,13 @@ static int sis_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
-	}	
+	}
 #endif
 
 				/* Clear vma list (only built for debugging) */
@@ -251,7 +251,7 @@ static int sis_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -289,14 +289,14 @@ static int sis_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->lock.hw_lock) {
 		dev->lock.hw_lock    = NULL; /* SHM removed */
 		dev->lock.pid	     = 0;
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -313,7 +313,7 @@ int sis_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(sis);
 #endif
@@ -356,7 +356,7 @@ int sis_init(void)
 		 SIS_PATCHLEVEL,
 		 SIS_DATE,
 		 sis_misc.minor);
-	
+
 	return 0;
 }
 
@@ -367,7 +367,7 @@ void sis_cleanup(void)
 	drm_device_t	      *dev = &sis_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&sis_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -378,7 +378,7 @@ void sis_cleanup(void)
 #ifdef CONFIG_MTRR
    	if(dev->agp && dev->agp->agp_mtrr) {
 	   	int retval;
-	   	retval = mtrr_del(dev->agp->agp_mtrr, 
+	   	retval = mtrr_del(dev->agp->agp_mtrr,
 				  dev->agp->agp_info.aper_base,
 				  dev->agp->agp_info.aper_size * 1024*1024);
 	   	DRM_DEBUG("mtrr_del = %d\n", retval);
@@ -433,7 +433,7 @@ int sis_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &sis_device;
 	int	      retcode = 0;
-	       
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
@@ -492,7 +492,7 @@ int sis_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -512,7 +512,7 @@ int sis_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -549,7 +549,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         if (lock.context < 0 || lock.context >= dev->queue_count)
                 return -EINVAL;
 #endif
-        
+
         if (!ret) {
 #if 0
                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
@@ -561,7 +561,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 /* Can't take lock if we just had it and
                                    there is contention. */
                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
-					lock.context, current->pid, j, 
+					lock.context, current->pid, j,
 					dev->lock.lock_time, jiffies);
                                 current->state = TASK_INTERRUPTIBLE;
 				current->policy |= SCHED_YIELD;
@@ -584,7 +584,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 atomic_inc(&dev->total_locks);
                                 break;  /* Got lock */
                         }
-                        
+
                                 /* Contention */
                         atomic_inc(&dev->total_sleeps);
                         current->state = TASK_INTERRUPTIBLE;
@@ -626,7 +626,6 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -635,7 +634,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -652,7 +651,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #if DRM_DMA_HISTOGRAM
         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 #endif
-        
+
         return ret;
 }
 
@@ -665,7 +664,7 @@ int sis_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_lock_t	  lock;
 
 	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -687,9 +686,7 @@ int sis_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		}
 	}
 
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
 
diff --git a/linux-core/tdfx_drv.c b/linux-core/tdfx_drv.c
index 07febea1..2026e9d0 100644
--- a/linux-core/tdfx_drv.c
+++ b/linux-core/tdfx_drv.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,7 +23,7 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
  *    Daryll Strauss <daryll@valinux.com>
@@ -36,7 +36,7 @@
 
 #define TDFX_NAME	 "tdfx"
 #define TDFX_DESC	 "3dfx Banshee/Voodoo3+"
-#define TDFX_DATE	 "20000719"
+#define TDFX_DATE	 "20000910"
 #define TDFX_MAJOR	 1
 #define TDFX_MINOR	 0
 #define TDFX_PATCHLEVEL  0
@@ -76,7 +76,7 @@ static drm_ioctl_desc_t	      tdfx_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,	  1, 1 },
-	
+
 	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { tdfx_addctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { tdfx_rmctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { tdfx_modctx,	  1, 1 },
@@ -128,7 +128,7 @@ __setup("tdfx=", tdfx_options);
 static int tdfx_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -170,7 +170,7 @@ static int tdfx_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
@@ -179,15 +179,15 @@ static int tdfx_setup(drm_device_t *dev)
 	init_waitqueue_head(&dev->buf_writers);
 
 	tdfx_res_ctx.handle=-1;
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -203,12 +203,12 @@ static int tdfx_takedown(drm_device_t *dev)
 
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -227,7 +227,7 @@ static int tdfx_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *temp;
 		drm_agp_mem_t *temp_next;
-	   
+
 		temp = dev->agp->memory;
 		while(temp != NULL) {
 			temp_next = temp->next;
@@ -246,7 +246,7 @@ static int tdfx_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -284,14 +284,14 @@ static int tdfx_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->lock.hw_lock) {
 		dev->lock.hw_lock    = NULL; /* SHM removed */
 		dev->lock.pid	     = 0;
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -308,7 +308,7 @@ static int tdfx_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(tdfx);
 #endif
@@ -340,7 +340,7 @@ static int tdfx_init(void)
 		 TDFX_PATCHLEVEL,
 		 TDFX_DATE,
 		 tdfx_misc.minor);
-	
+
 	return 0;
 }
 
@@ -351,7 +351,7 @@ static void tdfx_cleanup(void)
 	drm_device_t	      *dev = &tdfx_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&tdfx_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -379,17 +379,18 @@ int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = TDFX_MAJOR;
@@ -400,10 +401,10 @@ int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, TDFX_DATE);
 	DRM_COPY(version.desc, TDFX_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -411,7 +412,7 @@ int tdfx_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &tdfx_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -479,7 +480,7 @@ int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -499,7 +500,7 @@ int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -518,7 +519,8 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         dev->lck_start = start = get_cycles();
 #endif
 
-        copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+        if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
         if (lock.context == DRM_KERNEL_CONTEXT) {
                 DRM_ERROR("Process %d using kernel context %d\n",
@@ -536,7 +538,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         if (lock.context < 0 || lock.context >= dev->queue_count)
                 return -EINVAL;
 #endif
-        
+
         if (!ret) {
 #if 0
                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
@@ -548,7 +550,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 /* Can't take lock if we just had it and
                                    there is contention. */
                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
-					lock.context, current->pid, j, 
+					lock.context, current->pid, j,
 					dev->lock.lock_time, jiffies);
                                 current->state = TASK_INTERRUPTIBLE;
 				current->policy |= SCHED_YIELD;
@@ -571,7 +573,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 atomic_inc(&dev->total_locks);
                                 break;  /* Got lock */
                         }
-                        
+
                                 /* Contention */
                         atomic_inc(&dev->total_sleeps);
                         current->state = TASK_INTERRUPTIBLE;
@@ -615,7 +617,6 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -624,7 +625,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -647,7 +648,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #if DRM_DMA_HISTOGRAM
         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 #endif
-        
+
         return ret;
 }
 
@@ -659,8 +660,9 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -688,9 +690,7 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->priority = DEF_PRIORITY;
 	}
 #endif
-	
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux/Makefile.linux b/linux/Makefile.linux
index 7dfb20b1..7fe57f8e 100644
--- a/linux/Makefile.linux
+++ b/linux/Makefile.linux
@@ -54,7 +54,7 @@ PROGS=		drmstat
 
 DRMOBJS=	init.o memory.o proc.o auth.o context.o drawable.o bufs.o \
 		lists.o lock.o ioctl.o fops.o vm.o dma.o ctxbitmap.o
-DRMHEADERS=	drm.h drmP.h
+DRMHEADERS=	drm.h drmP.h compat-pre24.h
 
 GAMMAOBJS=      gamma_drv.o gamma_dma.o
 GAMMAHEADERS=   gamma_drv.h $(DRMHEADERS)
@@ -126,6 +126,7 @@ SIS := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
 	| grep -s 'SIS = ' | cut -d' ' -f3)
 PARAMS := $(shell if fgrep kill_fasync $(TREE)/linux/fs.h \
 	| egrep -q '(band|int, int)'; then echo 3; else echo 2; fi)
+MACHINE := $(shell echo `uname -m`)
 ifeq ($(AGP),0)
 AGP := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
 	| grep -s 'AGP_MODULE = ' | cut -d' ' -f3)
@@ -134,7 +135,11 @@ endif
 ifeq ($(AGP),1)
 MODCFLAGS += -DCONFIG_AGP -DCONFIG_AGP_MODULE
 DRMOBJS += agpsupport.o
-MODS += mga.o i810.o
+MODS += mga.o
+ifeq ($(MACHINE),i386)
+MODS += i810.o
+endif
+
 
 MGAOBJS=	mga_drv.o mga_dma.o mga_bufs.o mga_state.o mga_context.o
 MGAHEADERS=	mga_drv.h $(DRMHEADERS)
@@ -159,6 +164,7 @@ endif
 all::;@echo === KERNEL HEADERS IN $(TREE)
 all::;@echo === SMP=${SMP} MODVERSIONS=${MODVERSIONS} AGP=${AGP} SIS=${SIS}
 all::;@echo === kill_fasync has $(PARAMS) parameters
+all::;@echo === Compiling for machine $(MACHINE)
 all:: $(LIBS) $(MODS) $(PROGS)
 endif
 
diff --git a/linux/agpsupport.c b/linux/agpsupport.c
index 42a1bc2f..24fd59cd 100644
--- a/linux/agpsupport.c
+++ b/linux/agpsupport.c
@@ -95,7 +95,8 @@ int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
 	info.id_vendor         = kern->device->vendor;
 	info.id_device         = kern->device->device;
 
-	copy_to_user_ret((drm_agp_info_t *)arg, &info, sizeof(info), -EFAULT);
+	if (copy_to_user((drm_agp_info_t *)arg, &info, sizeof(info)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -134,8 +135,8 @@ int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dev->agp->acquired || !drm_agp.enable) return -EINVAL;
 
-	copy_from_user_ret(&mode, (drm_agp_mode_t *)arg, sizeof(mode),
-			   -EFAULT);
+	if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode)))
+		return -EFAULT;
 	
 	dev->agp->mode    = mode.mode;
 	(*drm_agp.enable)(mode.mode);
@@ -155,8 +156,8 @@ int drm_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
 	unsigned long    pages;
 	u32 		 type;
 	if (!dev->agp->acquired) return -EINVAL;
-	copy_from_user_ret(&request, (drm_agp_buffer_t *)arg, sizeof(request),
-			   -EFAULT);
+	if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
+		return -EFAULT;
 	if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
 		return -ENOMEM;
    
@@ -212,8 +213,8 @@ int drm_agp_unbind(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_agp_mem_t     *entry;
 
 	if (!dev->agp->acquired) return -EINVAL;
-	copy_from_user_ret(&request, (drm_agp_binding_t *)arg, sizeof(request),
-			   -EFAULT);
+	if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
+		return -EFAULT;
 	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
 		return -EINVAL;
 	if (!entry->bound) return -EINVAL;
@@ -231,8 +232,8 @@ int drm_agp_bind(struct inode *inode, struct file *filp, unsigned int cmd,
 	int               page;
 	
 	if (!dev->agp->acquired || !drm_agp.bind_memory) return -EINVAL;
-	copy_from_user_ret(&request, (drm_agp_binding_t *)arg, sizeof(request),
-			   -EFAULT);
+	if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
+		return -EFAULT;
 	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
 		return -EINVAL;
 	if (entry->bound) return -EINVAL;
@@ -253,8 +254,8 @@ int drm_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_agp_mem_t    *entry;
 	
 	if (!dev->agp->acquired) return -EINVAL;
-	copy_from_user_ret(&request, (drm_agp_buffer_t *)arg, sizeof(request),
-			   -EFAULT);
+	if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
+		return -EFAULT;
 	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
 		return -EINVAL;
 	if (entry->bound) drm_unbind_agp(entry->memory);
diff --git a/linux/auth.c b/linux/auth.c
index 4556bd96..80bb4b65 100644
--- a/linux/auth.c
+++ b/linux/auth.c
@@ -137,7 +137,8 @@ int drm_getmagic(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	
 	DRM_DEBUG("%u\n", auth.magic);
-	copy_to_user_ret((drm_auth_t *)arg, &auth, sizeof(auth), -EFAULT);
+	if (copy_to_user((drm_auth_t *)arg, &auth, sizeof(auth)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -149,7 +150,8 @@ int drm_authmagic(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_auth_t	   auth;
 	drm_file_t	   *file;
 
-	copy_from_user_ret(&auth, (drm_auth_t *)arg, sizeof(auth), -EFAULT);
+	if (copy_from_user(&auth, (drm_auth_t *)arg, sizeof(auth)))
+		return -EFAULT;
 	DRM_DEBUG("%u\n", auth.magic);
 	if ((file = drm_find_file(dev, auth.magic))) {
 		file->authenticated = 1;
diff --git a/linux/bufs.c b/linux/bufs.c
index c00f051a..28e0eb5f 100644
--- a/linux/bufs.c
+++ b/linux/bufs.c
@@ -133,12 +133,13 @@ int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd,
 	dev->maplist[dev->map_count-1] = map;
 	up(&dev->struct_sem);
 
-	copy_to_user_ret((drm_map_t *)arg, map, sizeof(*map), -EFAULT);
+	if (copy_to_user((drm_map_t *)arg, map, sizeof(*map)))
+		return -EFAULT;
 	if (map->type != _DRM_SHM) {
-		copy_to_user_ret(&((drm_map_t *)arg)->handle,
+		if (copy_to_user(&((drm_map_t *)arg)->handle,
 				 &map->offset,
-				 sizeof(map->offset),
-				 -EFAULT);
+				 sizeof(map->offset)))
+			return -EFAULT;
 	}		
 	return 0;
 }
@@ -166,10 +167,10 @@ int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	count	   = request.count;
 	order	   = drm_order(request.size);
@@ -295,10 +296,10 @@ int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = entry->buf_count;
 	request.size  = size;
 
-	copy_to_user_ret((drm_buf_desc_t *)arg,
+	if (copy_to_user((drm_buf_desc_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 	
 	atomic_dec(&dev->buf_alloc);
 	return 0;
@@ -324,10 +325,10 @@ int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_info_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 		if (dma->bufs[i].buf_count) ++count;
@@ -338,28 +339,26 @@ int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (request.count >= count) {
 		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 			if (dma->bufs[i].buf_count) {
-				copy_to_user_ret(&request.list[count].count,
+				if (copy_to_user(&request.list[count].count,
 						 &dma->bufs[i].buf_count,
 						 sizeof(dma->bufs[0]
-							.buf_count),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].size,
+							.buf_count)) ||
+				    copy_to_user(&request.list[count].size,
 						 &dma->bufs[i].buf_size,
-						 sizeof(dma->bufs[0].buf_size),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].low_mark,
+						 sizeof(dma->bufs[0].buf_size)) ||
+				    copy_to_user(&request.list[count].low_mark,
 						 &dma->bufs[i]
 						 .freelist.low_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.low_mark),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count]
+							.freelist.low_mark)) ||
+				    copy_to_user(&request.list[count]
 						 .high_mark,
 						 &dma->bufs[i]
 						 .freelist.high_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.high_mark),
-						 -EFAULT);
+							.freelist.high_mark)))
+					return -EFAULT;
+
 				DRM_DEBUG("%d %d %d %d %d\n",
 					  i,
 					  dma->bufs[i].buf_count,
@@ -372,10 +371,10 @@ int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	request.count = count;
 
-	copy_to_user_ret((drm_buf_info_t *)arg,
+	if (copy_to_user((drm_buf_info_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 	
 	return 0;
 }
@@ -392,10 +391,10 @@ int drm_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d, %d, %d\n",
 		  request.size, request.low_mark, request.high_mark);
@@ -427,17 +426,17 @@ int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_free_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d\n", request.count);
 	for (i = 0; i < request.count; i++) {
-		copy_from_user_ret(&idx,
+		if (copy_from_user(&idx,
 				   &request.list[i],
-				   sizeof(idx),
-				   -EFAULT);
+				   sizeof(idx)))
+			return -EFAULT;
 		if (idx < 0 || idx >= dma->buf_count) {
 			DRM_ERROR("Index %d (of %d max)\n",
 				  idx, dma->buf_count - 1);
@@ -480,10 +479,10 @@ int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_map_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	if (request.count >= dma->buf_count) {
 		down(&current->mm->mmap_sem);
@@ -529,10 +528,10 @@ done:
 	request.count = dma->buf_count;
 	DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
 
-	copy_to_user_ret((drm_buf_map_t *)arg,
+	if (copy_to_user((drm_buf_map_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 
 	return retcode;
 }
diff --git a/linux/compat-pre24.h b/linux/compat-pre24.h
new file mode 100644
index 00000000..257baca1
--- /dev/null
+++ b/linux/compat-pre24.h
@@ -0,0 +1,41 @@
+/* compat-pre24.h -- Linux pre-2.4.0 compatibility
+ * Created: Mon Aug 28 15:31:43 2000 by faith@acm.org
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ * 
+ * Authors:
+ *    Rickard E. (Rik) Faith <faith@valinux.com>
+ * 
+ */
+
+#ifndef _COMPAT_PRE24_H_
+#define _COMPAT_PRE24_H_
+
+				/* virt_to_page added in 2.4.0-test6 */
+#if LINUX_VERSION_CODE < 0x020400
+#define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr))
+#endif
+
+#define block_all_signals(a,b,c)
+#define unblock_all_signals()
+
+#endif
diff --git a/linux/context.c b/linux/context.c
index ca491094..933fd0cd 100644
--- a/linux/context.c
+++ b/linux/context.c
@@ -129,19 +129,21 @@ int drm_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		i;
 
 	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
+		return -EFAULT;
 	if (res.count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 			ctx.handle = i;
-			copy_to_user_ret(&res.contexts[i],
+			if (copy_to_user(&res.contexts[i],
 					 &i,
-					 sizeof(i),
-					 -EFAULT);
+					 sizeof(i)))
+				return -EFAULT;
 		}
 	}
 	res.count = DRM_RESERVED_CONTEXTS;
-	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -153,7 +155,8 @@ int drm_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	if ((ctx.handle = drm_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Init kernel's context and get a new one. */
 		drm_init_queue(dev, dev->queuelist[ctx.handle], &ctx);
@@ -161,7 +164,8 @@ int drm_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	drm_init_queue(dev, dev->queuelist[ctx.handle], &ctx);
 	DRM_DEBUG("%d\n", ctx.handle);
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -173,7 +177,8 @@ int drm_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_ctx_t	ctx;
 	drm_queue_t	*q;
 		
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	
 	DRM_DEBUG("%d\n", ctx.handle);
 	
@@ -206,7 +211,8 @@ int drm_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_ctx_t	ctx;
 	drm_queue_t	*q;
 		
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	
 	DRM_DEBUG("%d\n", ctx.handle);
 	
@@ -223,7 +229,8 @@ int drm_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	ctx.flags = q->flags;
 	atomic_dec(&q->use_count);
 	
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	
 	return 0;
 }
@@ -235,7 +242,8 @@ int drm_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	return drm_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -247,7 +255,8 @@ int drm_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	drm_context_switch_complete(dev, ctx.handle);
 
@@ -263,7 +272,8 @@ int drm_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_queue_t	*q;
 	drm_buf_t	*buf;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	
 	if (ctx.handle >= dev->queue_count) return -EINVAL;
diff --git a/linux/dma.c b/linux/dma.c
index ac2d1bc5..62340170 100644
--- a/linux/dma.c
+++ b/linux/dma.c
@@ -486,14 +486,16 @@ static int drm_dma_get_buffers_of_order(drm_device_t *dev, drm_dma_t *d,
 				  buf->pending);
 		}
 		buf->pid     = current->pid;
-		copy_to_user_ret(&d->request_indices[i],
+		if (copy_to_user(&d->request_indices[i],
 				 &buf->idx,
-				 sizeof(buf->idx),
-				 -EFAULT);
-		copy_to_user_ret(&d->request_sizes[i],
+				 sizeof(buf->idx)))
+			return -EFAULT;
+
+		if (copy_to_user(&d->request_sizes[i],
 				 &buf->total,
-				 sizeof(buf->total),
-				 -EFAULT);
+				 sizeof(buf->total)))
+			return -EFAULT;
+
 		++d->granted_count;
 	}
 	return 0;
diff --git a/linux/drawable.c b/linux/drawable.c
index 03839f5b..1328054e 100644
--- a/linux/drawable.c
+++ b/linux/drawable.c
@@ -39,7 +39,8 @@ int drm_adddraw(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	draw.handle = 0;	/* NOOP */
 	DRM_DEBUG("%d\n", draw.handle);
-	copy_to_user_ret((drm_draw_t *)arg, &draw, sizeof(draw), -EFAULT);
+	if (copy_to_user((drm_draw_t *)arg, &draw, sizeof(draw)))
+		return -EFAULT;
 	return 0;
 }
 
diff --git a/linux/drmP.h b/linux/drmP.h
index b9a4dab4..fcee4104 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,16 +23,22 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
- * 
+ *
  */
 
 #ifndef _DRM_P_H_
 #define _DRM_P_H_
 
 #ifdef __KERNEL__
+#ifdef __alpha__
+/* add include of current.h so that "current" is defined
+ * before static inline funcs in wait.h. Doing this so we
+ * can build the DRM (part of PI DRI). 4/21/2000 S + B */
+#include <asm/current.h>
+#endif /* __alpha__ */
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -47,6 +53,9 @@
 #include <linux/sched.h>
 #include <linux/smp_lock.h>	/* For (un)lock_kernel */
 #include <linux/mm.h>
+#ifdef __alpha__
+#include <asm/pgtable.h> /* For pte_wrprotect */
+#endif
 #include <asm/io.h>
 #include <asm/mman.h>
 #include <asm/uaccess.h>
@@ -61,6 +70,9 @@
 #include <linux/tqueue.h>
 #include <linux/poll.h>
 #endif
+#if LINUX_VERSION_CODE < 0x020400
+#include "compat-pre24.h"
+#endif
 #include "drm.h"
 
 #define DRM_DEBUG_CODE 2	  /* Include debugging code (if > 1, then
@@ -140,15 +152,75 @@ typedef struct wait_queue *wait_queue_head_t;
 #define module_exit(x)  void cleanup_module(void) { x(); }
 #endif
 
-				/* virt_to_page added in 2.4.0-test6 */
-#if LINUX_VERSION_CODE < 0x020400
-#define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr))
-#endif
-
 				/* Generic cmpxchg added in 2.3.x */
 #ifndef __HAVE_ARCH_CMPXCHG
 				/* Include this here so that driver can be
                                    used with older kernels. */
+#if defined(__alpha__)
+static __inline__ unsigned long
+__cmpxchg_u32(volatile int *m, int old, int new)
+{
+	unsigned long prev, cmp;
+
+	__asm__ __volatile__(
+	"1:	ldl_l %0,%2\n"
+	"	cmpeq %0,%3,%1\n"
+	"	beq %1,2f\n"
+	"	mov %4,%1\n"
+	"	stl_c %1,%2\n"
+	"	beq %1,3f\n"
+	"2:	mb\n"
+	".subsection 2\n"
+	"3:	br 1b\n"
+	".previous"
+	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
+	: "r"((long) old), "r"(new), "m"(*m));
+
+	return prev;
+}
+
+static __inline__ unsigned long
+__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
+{
+	unsigned long prev, cmp;
+
+	__asm__ __volatile__(
+	"1:	ldq_l %0,%2\n"
+	"	cmpeq %0,%3,%1\n"
+	"	beq %1,2f\n"
+	"	mov %4,%1\n"
+	"	stq_c %1,%2\n"
+	"	beq %1,3f\n"
+	"2:	mb\n"
+	".subsection 2\n"
+	"3:	br 1b\n"
+	".previous"
+	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
+	: "r"((long) old), "r"(new), "m"(*m));
+
+	return prev;
+}
+
+static __inline__ unsigned long
+__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
+{
+	switch (size) {
+		case 4:
+			return __cmpxchg_u32(ptr, old, new);
+		case 8:
+			return __cmpxchg_u64(ptr, old, new);
+	}
+	return old;
+}
+#define cmpxchg(ptr,o,n)						 \
+  ({									 \
+     __typeof__(*(ptr)) _o_ = (o);					 \
+     __typeof__(*(ptr)) _n_ = (n);					 \
+     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,		 \
+				    (unsigned long)_n_, sizeof(*(ptr))); \
+  })
+
+#elif __i386__
 static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 				      unsigned long new, int size)
 {
@@ -179,6 +251,7 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 #define cmpxchg(ptr,o,n)						\
   ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),		\
 				 (unsigned long)(n),sizeof(*(ptr))))
+#endif /* i386 & alpha */
 #endif
 
 				/* Macros to make printk easier */
@@ -231,7 +304,7 @@ typedef struct drm_ioctl_desc {
 
 typedef struct drm_devstate {
 	pid_t		  owner;	/* X server pid holding x_lock */
-	
+
 } drm_devstate_t;
 
 typedef struct drm_magic_entry {
@@ -292,14 +365,14 @@ typedef struct drm_buf {
 #define DRM_DMA_HISTOGRAM_NEXT(current)	 ((current)*10)
 typedef struct drm_histogram {
 	atomic_t	  total;
-	
+
 	atomic_t	  queued_to_dispatched[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  dispatched_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  completed_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
-	
+
 	atomic_t	  queued_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  queued_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
-	
+
 	atomic_t	  dma[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  schedule[DRM_DMA_HISTOGRAM_SLOTS];
 	atomic_t	  ctx[DRM_DMA_HISTOGRAM_SLOTS];
@@ -323,7 +396,7 @@ typedef struct drm_freelist {
 	int		  initialized; /* Freelist in use		   */
 	atomic_t	  count;       /* Number of free buffers	   */
 	drm_buf_t	  *next;       /* End pointer			   */
-	
+
 	wait_queue_head_t waiting;     /* Processes waiting on free bufs   */
 	int		  low_mark;    /* Low water mark		   */
 	int		  high_mark;   /* High water mark		   */
@@ -388,7 +461,7 @@ typedef struct drm_device_dma {
 	atomic_t	  total_prio;	/* Total DRM_DMA_PRIORITY	   */
 	atomic_t	  total_bytes;	/* Total bytes DMA'd		   */
 	atomic_t	  total_dmas;	/* Total DMA buffers dispatched	   */
-	
+
 	atomic_t	  total_missed_dma;  /* Missed drm_do_dma	    */
 	atomic_t	  total_missed_lock; /* Missed lock in drm_do_dma   */
 	atomic_t	  total_missed_free; /* Missed drm_free_this_buffer */
@@ -401,7 +474,7 @@ typedef struct drm_device_dma {
 	drm_buf_entry_t	  bufs[DRM_MAX_ORDER+1];
 	int		  buf_count;
 	drm_buf_t	  **buflist;	/* Vector of pointers info bufs	   */
-	int		  seg_count; 
+	int		  seg_count;
 	int		  page_count;
 	unsigned long	  *pagelist;
 	unsigned long	  byte_count;
@@ -462,7 +535,7 @@ typedef struct drm_device {
 	int		  unique_len;	/* Length of unique field	   */
 	dev_t		  device;	/* Device number for mknod	   */
 	char		  *devname;	/* For /proc/interrupts		   */
-	
+
 	int		  blocked;	/* Blocked due to VC switch?	   */
 	struct proc_dir_entry *root;	/* Root for this device's entries  */
 
@@ -483,7 +556,7 @@ typedef struct drm_device {
 	atomic_t	  total_ioctl;
 	atomic_t	  total_irq;	/* Total interruptions		   */
 	atomic_t	  total_ctx;	/* Total context switches	   */
-	
+
 	atomic_t	  total_locks;
 	atomic_t	  total_unlocks;
 	atomic_t	  total_contends;
@@ -524,7 +597,7 @@ typedef struct drm_device {
 #if DRM_DMA_HISTOGRAM
 	drm_histogram_t	  histo;
 #endif
-	
+
 				/* Callback to X server for context switch
 				   and for heavy-handed reset. */
 	char		  buf[DRM_BSZ]; /* Output buffer		   */
@@ -534,7 +607,7 @@ typedef struct drm_device {
 	struct fasync_struct *buf_async;/* Processes waiting for SIGIO	   */
 	wait_queue_head_t buf_readers;	/* Processes waiting to read	   */
 	wait_queue_head_t buf_writers;	/* Processes waiting to ctx switch */
-	
+
 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
 	drm_agp_head_t    *agp;
 #endif
diff --git a/linux/fops.c b/linux/fops.c
index f3966d96..8e373e5a 100644
--- a/linux/fops.c
+++ b/linux/fops.c
@@ -176,7 +176,8 @@ ssize_t drm_read(struct file *filp, char *buf, size_t count, loff_t *off)
 		} else {
 			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
 		}
-		copy_to_user_ret(buf, dev->buf_rp, cur, -EINVAL);
+		if (copy_to_user(buf, dev->buf_rp, cur))
+			return -EFAULT;
 		dev->buf_rp += cur;
 		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
 		send -= cur;
diff --git a/linux/gamma_dma.c b/linux/gamma_dma.c
index 4a2acfb3..ad981bdd 100644
--- a/linux/gamma_dma.c
+++ b/linux/gamma_dma.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,7 +23,7 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
  *
@@ -97,7 +97,7 @@ static inline void gamma_dma_quiescent_single(drm_device_t *dev)
 
 	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
 	GAMMA_WRITE(GAMMA_SYNC, 0);
-	
+
 	do {
 		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
 			;
@@ -115,13 +115,13 @@ static inline void gamma_dma_quiescent_dual(drm_device_t *dev)
 
 	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
 	GAMMA_WRITE(GAMMA_SYNC, 0);
-	
+
 				/* Read from first MX */
 	do {
 		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
 			;
 	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-	
+
 				/* Read from second MX */
 	do {
 		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
@@ -144,7 +144,7 @@ static void gamma_dma_service(int irq, void *device, struct pt_regs *regs)
 {
 	drm_device_t	 *dev = (drm_device_t *)device;
 	drm_device_dma_t *dma = dev->dma;
-	
+
 	atomic_inc(&dev->total_irq);
 	GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
 	GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
@@ -183,7 +183,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
 		atomic_inc(&dma->total_missed_dma);
 		return -EBUSY;
 	}
-	
+
 #if DRM_DMA_HISTOGRAM
 	dma_start = get_cycles();
 #endif
@@ -215,7 +215,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
 		clear_bit(0, &dev->dma_flag);
 		return 0;
 	}
-	
+
 	if (!gamma_dma_is_ready(dev)) {
 		clear_bit(0, &dev->dma_flag);
 		return -EBUSY;
@@ -246,7 +246,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
 		}
 		retcode = -EBUSY;
 		goto cleanup;
-			
+
 				/* POST: we will wait for the context
 				   switch and will dispatch on a later call
 				   when dev->last_context == buf->context.
@@ -371,9 +371,9 @@ again:
 			goto again;
 		}
 	}
-	
+
 	clear_bit(0, &dev->interrupt_flag);
-	
+
 #if DRM_DMA_HISTOGRAM
 	atomic_inc(&dev->histo.schedule[drm_histogram_slot(get_cycles()
 							   - schedule_start)]);
@@ -461,7 +461,7 @@ static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
 			goto cleanup;
 		}
 		buf->pending = 1;
-		
+
 		if (dev->last_context != buf->context
 		    && !(dev->queuelist[buf->context]->flags
 			 & _DRM_CONTEXT_PRESERVED)) {
@@ -496,7 +496,7 @@ static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
 		gamma_dma_dispatch(dev, address, length);
 		atomic_add(length, &dma->total_bytes);
 		atomic_inc(&dma->total_dmas);
-		
+
 		if (last_buf) {
 			drm_free_buffer(dev, last_buf);
 		}
@@ -509,7 +509,7 @@ cleanup:
 		gamma_dma_ready(dev);
 		drm_free_buffer(dev, last_buf);
 	}
-	
+
 	if (must_free && !dev->context_flag) {
 		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
 				  DRM_KERNEL_CONTEXT)) {
@@ -531,15 +531,15 @@ static int gamma_dma_send_buffers(drm_device_t *dev, drm_dma_t *d)
 		last_buf = dma->buflist[d->send_indices[d->send_count-1]];
 		add_wait_queue(&last_buf->dma_wait, &entry);
 	}
-	
+
 	if ((retcode = drm_dma_enqueue(dev, d))) {
 		if (d->flags & _DRM_DMA_BLOCK)
 			remove_wait_queue(&last_buf->dma_wait, &entry);
 		return retcode;
 	}
-	
+
 	gamma_dma_schedule(dev, 0);
-	
+
 	if (d->flags & _DRM_DMA_BLOCK) {
 		DRM_DEBUG("%d waiting\n", current->pid);
 		current->state = TASK_INTERRUPTIBLE;
@@ -586,7 +586,8 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		  retcode   = 0;
 	drm_dma_t	  d;
 
-	copy_from_user_ret(&d, (drm_dma_t *)arg, sizeof(d), -EFAULT);
+	if (copy_from_user(&d, (drm_dma_t *)arg, sizeof(d)))
+		return -EFAULT;
 	DRM_DEBUG("%d %d: %d send, %d req\n",
 		  current->pid, d.context, d.send_count, d.request_count);
 
@@ -609,7 +610,7 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (d.send_count) {
 		if (d.flags & _DRM_DMA_PRIORITY)
 			retcode = gamma_dma_priority(dev, &d);
-		else 
+		else
 			retcode = gamma_dma_send_buffers(dev, &d);
 	}
 
@@ -621,7 +622,8 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	DRM_DEBUG("%d returning, granted = %d\n",
 		  current->pid, d.granted_count);
-	copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);
+	if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
+		return -EFAULT;
 
 	return retcode;
 }
@@ -631,7 +633,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
 	int retcode;
 
 	if (!irq)     return -EINVAL;
-	
+
 	down(&dev->struct_sem);
 	if (dev->irq) {
 		up(&dev->struct_sem);
@@ -639,13 +641,13 @@ int gamma_irq_install(drm_device_t *dev, int irq)
 	}
 	dev->irq = irq;
 	up(&dev->struct_sem);
-	
+
 	DRM_DEBUG("%d\n", irq);
 
 	dev->context_flag     = 0;
 	dev->interrupt_flag   = 0;
 	dev->dma_flag	      = 0;
-	
+
 	dev->dma->next_buffer = NULL;
 	dev->dma->next_queue  = NULL;
 	dev->dma->this_buffer = NULL;
@@ -659,7 +661,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
 				/* Before installing handler */
 	GAMMA_WRITE(GAMMA_GCOMMANDMODE, 0);
 	GAMMA_WRITE(GAMMA_GDMACONTROL, 0);
-	
+
 				/* Install handler */
 	if ((retcode = request_irq(dev->irq,
 				   gamma_dma_service,
@@ -676,7 +678,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
 	GAMMA_WRITE(GAMMA_GINTENABLE,	    0x2001);
 	GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0x0008);
 	GAMMA_WRITE(GAMMA_GDELAYTIMER,	   0x39090);
-	
+
 	return 0;
 }
 
@@ -688,11 +690,11 @@ int gamma_irq_uninstall(drm_device_t *dev)
 	irq	 = dev->irq;
 	dev->irq = 0;
 	up(&dev->struct_sem);
-	
+
 	if (!irq) return -EINVAL;
-	
+
 	DRM_DEBUG("%d\n", irq);
-	
+
 	GAMMA_WRITE(GAMMA_GDELAYTIMER,	    0);
 	GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0);
 	GAMMA_WRITE(GAMMA_GINTENABLE,	    0);
@@ -709,9 +711,10 @@ int gamma_control(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_control_t	ctl;
 	int		retcode;
-	
-	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
-	
+
+	if (copy_from_user(&ctl, (drm_control_t *)arg, sizeof(ctl)))
+		return -EFAULT;
+
 	switch (ctl.func) {
 	case DRM_INST_HANDLER:
 		if ((retcode = gamma_irq_install(dev, ctl.irq)))
@@ -742,7 +745,8 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	dev->lck_start = start = get_cycles();
 #endif
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
@@ -757,7 +761,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (lock.context < 0 || lock.context >= dev->queue_count)
 		return -EINVAL;
 	q = dev->queuelist[lock.context];
-	
+
 	ret = drm_flush_block_and_flush(dev, lock.context, lock.flags);
 
 	if (!ret) {
@@ -787,7 +791,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 				atomic_inc(&q->total_locks);
 				break;	/* Got lock */
 			}
-			
+
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -802,9 +806,8 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 
 	drm_flush_unblock(dev, lock.context, lock.flags); /* cleanup phase */
-	
+
 	if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -813,7 +816,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
 		if (lock.flags & _DRM_LOCK_READY)
 			gamma_dma_ready(dev);
 		if (lock.flags & _DRM_LOCK_QUIESCENT) {
@@ -829,6 +832,6 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #if DRM_DMA_HISTOGRAM
 	atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 #endif
-	
+
 	return ret;
 }
diff --git a/linux/gamma_drv.c b/linux/gamma_drv.c
index 1fcd1933..dba974c2 100644
--- a/linux/gamma_drv.c
+++ b/linux/gamma_drv.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,7 +23,7 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
  *
@@ -42,7 +42,7 @@
 
 #define GAMMA_NAME	 "gamma"
 #define GAMMA_DESC	 "3dlabs GMX 2000"
-#define GAMMA_DATE	 "20000719"
+#define GAMMA_DATE	 "20000910"
 #define GAMMA_MAJOR	 1
 #define GAMMA_MINOR	 0
 #define GAMMA_PATCHLEVEL 0
@@ -87,7 +87,7 @@ static drm_ioctl_desc_t	      gamma_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]  = { drm_infobufs,	  1, 0 },
 	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]   = { drm_mapbufs,	  1, 0 },
 	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]  = { drm_freebufs,	  1, 0 },
-	
+
 	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { drm_addctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { drm_rmctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { drm_modctx,	  1, 1 },
@@ -120,7 +120,7 @@ MODULE_PARM_DESC(devices,
  * passed via the boot-loader (e.g., LILO).  It calls the insmod option
  * routine, drm_parse_options.
  */
- 
+
 
 static int __init gamma_options(char *str)
 {
@@ -134,7 +134,7 @@ __setup("gamma=", gamma_options);
 static int gamma_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -179,22 +179,22 @@ static int gamma_setup(drm_device_t *dev)
 #endif
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
 	dev->buf_async	  = NULL;
 	init_waitqueue_head(&dev->buf_readers);
 	init_waitqueue_head(&dev->buf_writers);
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -209,15 +209,15 @@ static int gamma_takedown(drm_device_t *dev)
 	DRM_DEBUG("\n");
 
 	if (dev->irq) gamma_irq_uninstall(dev);
-	
+
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -231,7 +231,7 @@ static int gamma_takedown(drm_device_t *dev)
 		}
 		dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 	}
-	
+
 				/* Clear vma list (only built for debugging) */
 	if (dev->vmalist) {
 		for (vma = dev->vmalist; vma; vma = vma_next) {
@@ -240,7 +240,7 @@ static int gamma_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -278,7 +278,7 @@ static int gamma_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->queuelist) {
 		for (i = 0; i < dev->queue_count; i++) {
 			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
@@ -304,7 +304,7 @@ static int gamma_takedown(drm_device_t *dev)
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -349,7 +349,7 @@ static int gamma_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(gamma);
 #endif
@@ -374,7 +374,7 @@ static int gamma_init(void)
 		 GAMMA_DATE,
 		 gamma_misc.minor,
 		 devices);
-	
+
 	return 0;
 }
 
@@ -385,7 +385,7 @@ static void gamma_cleanup(void)
 	drm_device_t	      *dev = &gamma_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&gamma_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -405,17 +405,18 @@ int gamma_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = GAMMA_MAJOR;
@@ -426,10 +427,10 @@ int gamma_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, GAMMA_DATE);
 	DRM_COPY(version.desc, GAMMA_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -437,7 +438,7 @@ int gamma_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &gamma_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -504,7 +505,7 @@ int gamma_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -524,7 +525,7 @@ int gamma_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -537,8 +538,9 @@ int gamma_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -563,9 +565,7 @@ int gamma_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->histo.lhld[drm_histogram_slot(get_cycles()
 						       - dev->lck_start)]);
 #endif
-	
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux/i810_bufs.c b/linux/i810_bufs.c
index fa1f84dc..a999e96b 100644
--- a/linux/i810_bufs.c
+++ b/linux/i810_bufs.c
@@ -56,10 +56,10 @@ int i810_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	count = request.count;
 	order = drm_order(request.size);
@@ -155,10 +155,10 @@ int i810_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = entry->buf_count;
 	request.size  = size;
    
-	copy_to_user_ret((drm_buf_desc_t *)arg,
+	if (copy_to_user((drm_buf_desc_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
    
 	atomic_dec(&dev->buf_alloc);
 	dma->flags = _DRM_DMA_USE_AGP;
@@ -170,10 +170,10 @@ int i810_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_buf_desc_t	 request;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	if(request.flags & _DRM_AGP_BUFFER)
 		return i810_addbufs_agp(inode, filp, cmd, arg);
@@ -201,10 +201,10 @@ int i810_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_info_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 		if (dma->bufs[i].buf_count) ++count;
@@ -215,28 +215,26 @@ int i810_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (request.count >= count) {
 		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 			if (dma->bufs[i].buf_count) {
-				copy_to_user_ret(&request.list[count].count,
+				if (copy_to_user(&request.list[count].count,
 						 &dma->bufs[i].buf_count,
 						 sizeof(dma->bufs[0]
-							.buf_count),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].size,
+							.buf_count)) ||
+				    copy_to_user(&request.list[count].size,
 						 &dma->bufs[i].buf_size,
-						 sizeof(dma->bufs[0].buf_size),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].low_mark,
+						 sizeof(dma->bufs[0].buf_size)) ||
+				    copy_to_user(&request.list[count].low_mark,
 						 &dma->bufs[i]
 						 .freelist.low_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.low_mark),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count]
+							.freelist.low_mark)) ||
+				    copy_to_user(&request.list[count]
 						 .high_mark,
 						 &dma->bufs[i]
 						 .freelist.high_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.high_mark),
-						 -EFAULT);
+							.freelist.high_mark)))
+					return -EFAULT;
+
 				DRM_DEBUG("%d %d %d %d %d\n",
 					  i,
 					  dma->bufs[i].buf_count,
@@ -249,10 +247,10 @@ int i810_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	request.count = count;
 
-	copy_to_user_ret((drm_buf_info_t *)arg,
+	if (copy_to_user((drm_buf_info_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 	
 	return 0;
 }
@@ -269,10 +267,10 @@ int i810_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d, %d, %d\n",
 		  request.size, request.low_mark, request.high_mark);
@@ -304,17 +302,17 @@ int i810_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_free_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d\n", request.count);
 	for (i = 0; i < request.count; i++) {
-		copy_from_user_ret(&idx,
+		if (copy_from_user(&idx,
 				   &request.list[i],
-				   sizeof(idx),
-				   -EFAULT);
+				   sizeof(idx)))
+			return -EFAULT;
 		if (idx < 0 || idx >= dma->buf_count) {
 			DRM_ERROR("Index %d (of %d max)\n",
 				  idx, dma->buf_count - 1);
diff --git a/linux/i810_context.c b/linux/i810_context.c
index 85c0877b..c331beed 100644
--- a/linux/i810_context.c
+++ b/linux/i810_context.c
@@ -103,19 +103,21 @@ int i810_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		i;
 
 	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
+		return -EFAULT;
 	if (res.count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 			ctx.handle = i;
-			copy_to_user_ret(&res.contexts[i],
+			if (copy_to_user(&res.contexts[i],
 					 &i,
-					 sizeof(i),
-					 -EFAULT);
+					 sizeof(i)))
+				return -EFAULT;
 		}
 	}
 	res.count = DRM_RESERVED_CONTEXTS;
-	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -126,7 +128,8 @@ int i810_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	if ((ctx.handle = i810_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Skip kernel's context and get a new one. */
 		ctx.handle = i810_alloc_queue(dev);
@@ -137,7 +140,8 @@ int i810_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 		return -ENOMEM;
 	}
 	DRM_DEBUG("%d\n", ctx.handle);
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -153,10 +157,12 @@ int i810_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
 	/* This is 0, because we don't hanlde any context flags */
 	ctx.flags = 0;
-	copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -167,7 +173,8 @@ int i810_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	return i810_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -179,7 +186,8 @@ int i810_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	i810_context_switch_complete(dev, ctx.handle);
 
@@ -193,7 +201,8 @@ int i810_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
    	if(ctx.handle != DRM_KERNEL_CONTEXT) {
 	   	drm_ctxbitmap_free(dev, ctx.handle);
diff --git a/linux/i810_dma.c b/linux/i810_dma.c
index 5792bf39..a9f860cd 100644
--- a/linux/i810_dma.c
+++ b/linux/i810_dma.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -107,14 +107,14 @@ static drm_buf_t *i810_freelist_get(drm_device_t *dev)
    	drm_device_dma_t *dma = dev->dma;
 	int		 i;
    	int 		 used;
-   
+
 	/* Linear search might not be the best solution */
 
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 		/* In use is already a pointer */
-	   	used = cmpxchg(buf_priv->in_use, I810_BUF_FREE, 
+	   	used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
 			       I810_BUF_CLIENT);
 	   	if(used == I810_BUF_FREE) {
 			return buf;
@@ -131,14 +131,14 @@ static int i810_freelist_put(drm_device_t *dev, drm_buf_t *buf)
 {
    	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
    	int used;
-   
+
    	/* In use is already a pointer */
    	used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
    	if(used != I810_BUF_CLIENT) {
 	   	DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
 	   	return -EINVAL;
 	}
-   
+
    	return 0;
 }
 
@@ -166,10 +166,10 @@ int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 	dev_priv = dev->dev_private;
 	buf      = dev_priv->mmap_buffer;
 	buf_priv = buf->dev_private;
-   
+
 	vma->vm_flags |= (VM_IO | VM_DONTCOPY);
 	vma->vm_file = filp;
-   
+
    	buf_priv->currently_mapped = I810_BUF_MAPPED;
 	unlock_kernel();
 
@@ -196,9 +196,9 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
 		old_fops = filp->f_op;
 		filp->f_op = &i810_buffer_fops;
 		dev_priv->mmap_buffer = buf;
-		buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total, 
+		buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
 						    PROT_READ|PROT_WRITE,
-						    MAP_SHARED, 
+						    MAP_SHARED,
 						    buf->bus_address);
 		dev_priv->mmap_buffer = NULL;
    		filp->f_op = old_fops;
@@ -222,15 +222,15 @@ static int i810_unmap_buffer(drm_buf_t *buf)
 	int retcode = 0;
 
 	if(VM_DONTCOPY != 0) {
-		if(buf_priv->currently_mapped != I810_BUF_MAPPED) 
+		if(buf_priv->currently_mapped != I810_BUF_MAPPED)
 			return -EINVAL;
 		down(&current->mm->mmap_sem);
 #if LINUX_VERSION_CODE < 0x020399
-        	retcode = do_munmap((unsigned long)buf_priv->virtual, 
+        	retcode = do_munmap((unsigned long)buf_priv->virtual,
 				    (size_t) buf->total);
 #else
-        	retcode = do_munmap(current->mm, 
-				    (unsigned long)buf_priv->virtual, 
+        	retcode = do_munmap(current->mm,
+				    (unsigned long)buf_priv->virtual,
 				    (size_t) buf->total);
 #endif
    		up(&current->mm->mmap_sem);
@@ -241,7 +241,7 @@ static int i810_unmap_buffer(drm_buf_t *buf)
 	return retcode;
 }
 
-static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d, 
+static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 			       struct file *filp)
 {
 	drm_file_t	  *priv	  = filp->private_data;
@@ -255,16 +255,16 @@ static int i810_dma_get_buffer(drm_device_t *dev, drm_i810_dma_t *d,
 	   	DRM_DEBUG("%s retcode %d\n", __FUNCTION__, retcode);
 		goto out_get_buf;
 	}
-   
+
 	retcode = i810_map_buffer(buf, filp);
 	if(retcode) {
 		i810_freelist_put(dev, buf);
-	   	DRM_DEBUG("mapbuf failed in %s retcode %d\n", 
+	   	DRM_DEBUG("mapbuf failed in %s retcode %d\n",
 			  __FUNCTION__, retcode);
 	   	goto out_get_buf;
 	}
 	buf->pid     = priv->pid;
-	buf_priv = buf->dev_private;	
+	buf_priv = buf->dev_private;
 	d->granted = 1;
    	d->request_idx = buf->idx;
    	d->request_size = buf->total;
@@ -277,22 +277,22 @@ out_get_buf:
 static unsigned long i810_alloc_page(drm_device_t *dev)
 {
 	unsigned long address;
-   
+
 	address = __get_free_page(GFP_KERNEL);
-	if(address == 0UL) 
+	if(address == 0UL)
 		return 0;
-	
+
 	atomic_inc(&virt_to_page(address)->count);
 	set_bit(PG_locked, &virt_to_page(address)->flags);
-   
+
 	return address;
 }
 
 static void i810_free_page(drm_device_t *dev, unsigned long page)
 {
-	if(page == 0UL) 
+	if(page == 0UL)
 		return;
-	
+
 	atomic_dec(&virt_to_page(page)->count);
 	clear_bit(PG_locked, &virt_to_page(page)->flags);
 	wake_up(&virt_to_page(page)->wait);
@@ -306,9 +306,9 @@ static int i810_dma_cleanup(drm_device_t *dev)
 
 	if(dev->dev_private) {
 		int i;
-	   	drm_i810_private_t *dev_priv = 
+	   	drm_i810_private_t *dev_priv =
 	     		(drm_i810_private_t *) dev->dev_private;
-	   
+
 	   	if(dev_priv->ring.virtual_start) {
 		   	drm_ioremapfree((void *) dev_priv->ring.virtual_start,
 					dev_priv->ring.Size);
@@ -318,7 +318,7 @@ static int i810_dma_cleanup(drm_device_t *dev)
 		   	/* Need to rewrite hardware status page */
 		   	I810_WRITE(0x02080, 0x1ffff000);
 		}
-	   	drm_free(dev->dev_private, sizeof(drm_i810_private_t), 
+	   	drm_free(dev->dev_private, sizeof(drm_i810_private_t),
 			 DRM_MEM_DRIVER);
 	   	dev->dev_private = NULL;
 
@@ -342,14 +342,14 @@ static int i810_wait_ring(drm_device_t *dev, int n)
 	end = jiffies + (HZ*3);
    	while (ring->space < n) {
 	   	int i;
-	
+
 	   	ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
 	   	ring->space = ring->head - (ring->tail+8);
 		if (ring->space < 0) ring->space += ring->Size;
-	   
+
 		if (ring->head != last_head)
 		   end = jiffies + (HZ*3);
-	  
+
 	   	iters++;
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("space: %d wanted %d\n", ring->space, n);
@@ -360,7 +360,7 @@ static int i810_wait_ring(drm_device_t *dev, int n)
 	   	for (i = 0 ; i < 2000 ; i++) ;
 	}
 
-out_wait_ring:   
+out_wait_ring:
    	return iters;
 }
 
@@ -368,7 +368,7 @@ static void i810_kernel_lost_context(drm_device_t *dev)
 {
       	drm_i810_private_t *dev_priv = dev->dev_private;
    	drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
-      
+
    	ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
      	ring->tail = I810_READ(LP_RING + RING_TAIL);
      	ring->space = ring->head - (ring->tail+8);
@@ -382,7 +382,7 @@ static int i810_freelist_init(drm_device_t *dev)
    	int my_idx = 24;
    	u32 *hw_status = (u32 *)(dev_priv->hw_status_page + my_idx);
    	int i;
-   
+
    	if(dma->buf_count > 1019) {
 	   	/* Not enough space in the status page for the freelist */
 	   	return -EINVAL;
@@ -391,20 +391,20 @@ static int i810_freelist_init(drm_device_t *dev)
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
+
 	   	buf_priv->in_use = hw_status++;
 	   	buf_priv->my_use_idx = my_idx;
 	   	my_idx += 4;
 
 	   	*buf_priv->in_use = I810_BUF_FREE;
 
-		buf_priv->kernel_virtual = drm_ioremap(buf->bus_address, 
+		buf_priv->kernel_virtual = drm_ioremap(buf->bus_address,
 						       buf->total);
 	}
 	return 0;
 }
 
-static int i810_dma_initialize(drm_device_t *dev, 
+static int i810_dma_initialize(drm_device_t *dev,
 			       drm_i810_private_t *dev_priv,
 			       drm_i810_init_t *init)
 {
@@ -419,27 +419,27 @@ static int i810_dma_initialize(drm_device_t *dev,
 	   	DRM_ERROR("ring_map or buffer_map are invalid\n");
 	   	return -EINVAL;
 	}
-   
+
    	dev_priv->ring_map_idx = init->ring_map_idx;
    	dev_priv->buffer_map_idx = init->buffer_map_idx;
 	sarea_map = dev->maplist[0];
-	dev_priv->sarea_priv = (drm_i810_sarea_t *) 
-		((u8 *)sarea_map->handle + 
+	dev_priv->sarea_priv = (drm_i810_sarea_t *)
+		((u8 *)sarea_map->handle +
 		 init->sarea_priv_offset);
 
    	atomic_set(&dev_priv->flush_done, 0);
 	init_waitqueue_head(&dev_priv->flush_queue);
-   	
+
    	dev_priv->ring.Start = init->ring_start;
    	dev_priv->ring.End = init->ring_end;
    	dev_priv->ring.Size = init->ring_size;
 
-   	dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base + 
-						   init->ring_start, 
+   	dev_priv->ring.virtual_start = drm_ioremap(dev->agp->base +
+						   init->ring_start,
 						   init->ring_size);
 
    	dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
-   
+
    	if (dev_priv->ring.virtual_start == NULL) {
 	   	i810_dma_cleanup(dev);
 	   	DRM_ERROR("can not ioremap virtual address for"
@@ -456,8 +456,8 @@ static int i810_dma_initialize(drm_device_t *dev,
 	dev_priv->front_di1 = init->front_offset | init->pitch_bits;
 	dev_priv->back_di1 = init->back_offset | init->pitch_bits;
 	dev_priv->zi1 = init->depth_offset | init->pitch_bits;
-	
-   
+
+
    	/* Program Hardware Status Page */
    	dev_priv->hw_status_page = i810_alloc_page(dev);
    	memset((void *) dev_priv->hw_status_page, 0, PAGE_SIZE);
@@ -467,10 +467,10 @@ static int i810_dma_initialize(drm_device_t *dev,
 		return -ENOMEM;
 	}
    	DRM_DEBUG("hw status page @ %lx\n", dev_priv->hw_status_page);
-   
+
    	I810_WRITE(0x02080, virt_to_bus((void *)dev_priv->hw_status_page));
    	DRM_DEBUG("Enabled hardware status page\n");
-   
+
    	/* Now we need to init our freelist */
    	if(i810_freelist_init(dev) != 0) {
 	   	i810_dma_cleanup(dev);
@@ -489,13 +489,13 @@ int i810_dma_init(struct inode *inode, struct file *filp,
    	drm_i810_private_t *dev_priv;
    	drm_i810_init_t init;
    	int retcode = 0;
-	
-   	copy_from_user_ret(&init, (drm_i810_init_t *)arg, 
-			   sizeof(init), -EFAULT);
-	
+
+  	if (copy_from_user(&init, (drm_i810_init_t *)arg, sizeof(init)))
+		return -EFAULT;
+
    	switch(init.func) {
 	 	case I810_INIT_DMA:
-	   		dev_priv = drm_alloc(sizeof(drm_i810_private_t), 
+	   		dev_priv = drm_alloc(sizeof(drm_i810_private_t),
 					     DRM_MEM_DRIVER);
 	   		if(dev_priv == NULL) return -ENOMEM;
 	   		retcode = i810_dma_initialize(dev, dev_priv, &init);
@@ -507,7 +507,7 @@ int i810_dma_init(struct inode *inode, struct file *filp,
 	   		retcode = -EINVAL;
 	   	break;
 	}
-   
+
    	return retcode;
 }
 
@@ -519,9 +519,9 @@ int i810_dma_init(struct inode *inode, struct file *filp,
  * Use 'volatile' & local var tmp to force the emitted values to be
  * identical to the verified ones.
  */
-static void i810EmitContextVerified( drm_device_t *dev, 
-				     volatile unsigned int *code ) 
-{	
+static void i810EmitContextVerified( drm_device_t *dev,
+				     volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
 	unsigned int tmp;
@@ -539,22 +539,22 @@ static void i810EmitContextVerified( drm_device_t *dev,
 		tmp = code[i];
 
 		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24)) 
+		    (tmp & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp ); 
+			OUT_RING( tmp );
 			j++;
-		} 
+		}
 	}
 
-	if (j & 1) 
-		OUT_RING( 0 ); 
+	if (j & 1)
+		OUT_RING( 0 );
 
 	ADVANCE_LP_RING();
 }
 
-static void i810EmitTexVerified( drm_device_t *dev, 
-				 volatile unsigned int *code ) 
-{	
+static void i810EmitTexVerified( drm_device_t *dev,
+				 volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
 	unsigned int tmp;
@@ -571,15 +571,15 @@ static void i810EmitTexVerified( drm_device_t *dev,
 		tmp = code[i];
 
 		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24)) 
+		    (tmp & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp ); 
+			OUT_RING( tmp );
 			j++;
 		}
-	} 
-		
-	if (j & 1) 
-		OUT_RING( 0 ); 
+	}
+
+	if (j & 1)
+		OUT_RING( 0 );
 
 	ADVANCE_LP_RING();
 }
@@ -587,9 +587,9 @@ static void i810EmitTexVerified( drm_device_t *dev,
 
 /* Need to do some additional checking when setting the dest buffer.
  */
-static void i810EmitDestVerified( drm_device_t *dev, 
-				  volatile unsigned int *code ) 
-{	
+static void i810EmitDestVerified( drm_device_t *dev,
+				  volatile unsigned int *code )
+{
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	unsigned int tmp;
 	RING_LOCALS;
@@ -653,9 +653,9 @@ static void i810EmitState( drm_device_t *dev )
 
 
 
-/* need to verify 
+/* need to verify
  */
-static void i810_dma_dispatch_clear( drm_device_t *dev, int flags, 
+static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 				     unsigned int clear_color,
 				     unsigned int clear_zval )
 {
@@ -686,10 +686,10 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 		    pbox->y2 > dev_priv->h)
 			continue;
 
-	   	if ( flags & I810_FRONT ) {	    
+	   	if ( flags & I810_FRONT ) {
 		   	DRM_DEBUG("clear front\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -701,8 +701,8 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 
 		if ( flags & I810_BACK ) {
 			DRM_DEBUG("clear back\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -714,8 +714,8 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 
 		if ( flags & I810_DEPTH ) {
 			DRM_DEBUG("clear depth\n");
-			BEGIN_LP_RING( 6 );	    
-			OUT_RING( BR00_BITBLT_CLIENT | 
+			BEGIN_LP_RING( 6 );
+			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
 			OUT_RING( BR13_SOLID_PATTERN | (0xF0 << 16) | pitch );
 			OUT_RING( (height << 16) | width );
@@ -746,7 +746,7 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
       	if (nbox > I810_NR_SAREA_CLIPRECTS)
      		nbox = I810_NR_SAREA_CLIPRECTS;
 
-	for (i = 0 ; i < nbox; i++, pbox++) 
+	for (i = 0 ; i < nbox; i++, pbox++)
 	{
 		unsigned int w = pbox->x2 - pbox->x1;
 		unsigned int h = pbox->y2 - pbox->y1;
@@ -758,7 +758,7 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 		    pbox->x2 > dev_priv->w ||
 		    pbox->y2 > dev_priv->h)
 			continue;
- 
+
 	   	DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
 			  pbox[i].x1, pbox[i].y1,
 			  pbox[i].x2, pbox[i].y2);
@@ -768,14 +768,14 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 		OUT_RING( pitch | (0xCC << 16));
 		OUT_RING( (h << 16) | (w * cpp));
 		OUT_RING( dst );
-		OUT_RING( pitch );	
+		OUT_RING( pitch );
 		OUT_RING( start );
 		ADVANCE_LP_RING();
 	}
 }
 
 
-static void i810_dma_dispatch_vertex(drm_device_t *dev, 
+static void i810_dma_dispatch_vertex(drm_device_t *dev,
 				     drm_buf_t *buf,
 				     int discard,
 				     int used)
@@ -786,30 +786,30 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
    	drm_clip_rect_t *box = sarea_priv->boxes;
    	int nbox = sarea_priv->nbox;
 	unsigned long address = (unsigned long)buf->bus_address;
-	unsigned long start = address - dev->agp->base;     
+	unsigned long start = address - dev->agp->base;
 	int i = 0, u;
    	RING_LOCALS;
 
    	i810_kernel_lost_context(dev);
 
-   	if (nbox > I810_NR_SAREA_CLIPRECTS) 
+   	if (nbox > I810_NR_SAREA_CLIPRECTS)
 		nbox = I810_NR_SAREA_CLIPRECTS;
 
 	if (discard) {
-		u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, 
+		u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 			    I810_BUF_HARDWARE);
 		if(u != I810_BUF_CLIENT) {
 			DRM_DEBUG("xxxx 2\n");
 		}
 	}
 
-	if (used > 4*1024) 
+	if (used > 4*1024)
 		used = 0;
 
 	if (sarea_priv->dirty)
 	   i810EmitState( dev );
 
-  	DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n", 
+  	DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
 		  address, used, nbox);
 
    	dev_priv->counter++;
@@ -823,7 +823,7 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
 		*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE |
 					     sarea_priv->vertex_prim |
 					     ((used/4)-2));
-		
+
 		if (used & 4) {
 			*(u32 *)((u32)buf_priv->virtual + used) = 0;
 			used += 4;
@@ -831,26 +831,26 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
 
 		i810_unmap_buffer(buf);
 	}
-		   
+
 	if (used) {
 		do {
 			if (i < nbox) {
 				BEGIN_LP_RING(4);
-				OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR | 
+				OUT_RING( GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
 					  SC_ENABLE );
 				OUT_RING( GFX_OP_SCISSOR_INFO );
 				OUT_RING( box[i].x1 | (box[i].y1<<16) );
 				OUT_RING( (box[i].x2-1) | ((box[i].y2-1)<<16) );
 				ADVANCE_LP_RING();
 			}
-			
+
 			BEGIN_LP_RING(4);
 			OUT_RING( CMD_OP_BATCH_BUFFER );
 			OUT_RING( start | BB1_PROTECTED );
 			OUT_RING( start + used - 4 );
 			OUT_RING( 0 );
 			ADVANCE_LP_RING();
-			
+
 		} while (++i < nbox);
 	}
 
@@ -878,15 +878,15 @@ static void i810_dma_service(int irq, void *device, struct pt_regs *regs)
 {
 	drm_device_t	 *dev = (drm_device_t *)device;
    	u16 temp;
-   
+
 	atomic_inc(&dev->total_irq);
       	temp = I810_READ16(I810REG_INT_IDENTITY_R);
    	temp = temp & ~(0x6000);
-   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R, 
+   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
 				   temp); /* Clear all interrupts */
 	else
 	   return;
- 
+
    	queue_task(&dev->tq, &tq_immediate);
    	mark_bh(IMMEDIATE_BH);
 }
@@ -904,9 +904,9 @@ int i810_irq_install(drm_device_t *dev, int irq)
 {
 	int retcode;
 	u16 temp;
-   
+
 	if (!irq)     return -EINVAL;
-	
+
 	down(&dev->struct_sem);
 	if (dev->irq) {
 		up(&dev->struct_sem);
@@ -914,14 +914,14 @@ int i810_irq_install(drm_device_t *dev, int irq)
 	}
 	dev->irq = irq;
 	up(&dev->struct_sem);
-	
+
    	DRM_DEBUG(  "Interrupt Install : %d\n", irq);
 	DRM_DEBUG("%d\n", irq);
 
 	dev->context_flag     = 0;
 	dev->interrupt_flag   = 0;
 	dev->dma_flag	      = 0;
-	
+
 	dev->dma->next_buffer = NULL;
 	dev->dma->next_queue  = NULL;
 	dev->dma->this_buffer = NULL;
@@ -935,7 +935,7 @@ int i810_irq_install(drm_device_t *dev, int irq)
    	temp = I810_READ16(I810REG_HWSTAM);
    	temp = temp & 0x6000;
    	I810_WRITE16(I810REG_HWSTAM, temp);
-   	
+
       	temp = I810_READ16(I810REG_INT_MASK_R);
    	temp = temp & 0x6000;
    	I810_WRITE16(I810REG_INT_MASK_R, temp); /* Unmask interrupts */
@@ -957,7 +957,7 @@ int i810_irq_install(drm_device_t *dev, int irq)
    	temp = I810_READ16(I810REG_INT_ENABLE_R);
    	temp = temp & 0x6000;
    	temp = temp | 0x0003;
-   	I810_WRITE16(I810REG_INT_ENABLE_R, 
+   	I810_WRITE16(I810REG_INT_ENABLE_R,
 		     temp); /* Enable bp & user interrupts */
 	return 0;
 }
@@ -974,20 +974,20 @@ int i810_irq_uninstall(drm_device_t *dev)
 	irq	 = dev->irq;
 	dev->irq = 0;
 	up(&dev->struct_sem);
-	
+
 	if (!irq) return -EINVAL;
 
-   	DRM_DEBUG(  "Interrupt UnInstall: %d\n", irq);	
+   	DRM_DEBUG(  "Interrupt UnInstall: %d\n", irq);
 	DRM_DEBUG("%d\n", irq);
-   
+
    	temp = I810_READ16(I810REG_INT_IDENTITY_R);
    	temp = temp & ~(0x6000);
-   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R, 
+   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
 				   temp); /* Clear all interrupts */
-   
+
    	temp = I810_READ16(I810REG_INT_ENABLE_R);
    	temp = temp & 0x6000;
-   	I810_WRITE16(I810REG_INT_ENABLE_R, 
+   	I810_WRITE16(I810REG_INT_ENABLE_R,
 		     temp);                     /* Disable all interrupts */
 
    	free_irq(irq, dev);
@@ -1002,11 +1002,12 @@ int i810_control(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_control_t	ctl;
 	int		retcode;
-   
+
    	DRM_DEBUG(  "i810_control\n");
 
-	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
-	
+	if (copy_from_user(&ctl, (drm_control_t *)arg, sizeof(ctl)))
+		return -EFAULT;
+
 	switch (ctl.func) {
 	case DRM_INST_HANDLER:
 		if ((retcode = i810_irq_install(dev, ctl.irq)))
@@ -1062,7 +1063,7 @@ static void i810_dma_quiescent(drm_device_t *dev)
 {
       	DECLARE_WAITQUEUE(entry, current);
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-	unsigned long end;      
+	unsigned long end;
 
    	if(dev_priv == NULL) {
 	   	return;
@@ -1071,23 +1072,23 @@ static void i810_dma_quiescent(drm_device_t *dev)
    	current->state = TASK_INTERRUPTIBLE;
    	add_wait_queue(&dev_priv->flush_queue, &entry);
    	end = jiffies + (HZ*3);
-   
+
    	for (;;) {
 	      	i810_dma_quiescent_emit(dev);
 	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("lockup\n");
 		   	break;
-		}	   
+		}
 	      	schedule_timeout(HZ*3);
 	      	if (signal_pending(current)) {
 		   	break;
 		}
 	}
-   
+
    	current->state = TASK_RUNNING;
    	remove_wait_queue(&dev_priv->flush_queue, &entry);
-   
+
    	return;
 }
 
@@ -1097,7 +1098,7 @@ static int i810_flush_queue(drm_device_t *dev)
   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
 	drm_device_dma_t *dma = dev->dma;
 	unsigned long end;
-   	int i, ret = 0;      
+   	int i, ret = 0;
 
    	if(dev_priv == NULL) {
 	   	return 0;
@@ -1112,14 +1113,14 @@ static int i810_flush_queue(drm_device_t *dev)
 		if((signed)(end - jiffies) <= 0) {
 		   	DRM_ERROR("lockup\n");
 		   	break;
-		}	   
+		}
 	      	schedule_timeout(HZ*3);
 	      	if (signal_pending(current)) {
 		   	ret = -EINTR; /* Can't restart */
 		   	break;
 		}
 	}
-   
+
    	current->state = TASK_RUNNING;
    	remove_wait_queue(&dev_priv->flush_queue, &entry);
 
@@ -1127,8 +1128,8 @@ static int i810_flush_queue(drm_device_t *dev)
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
-		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE, 
+
+		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
 				   I810_BUF_FREE);
 
 		if (used == I810_BUF_HARDWARE)
@@ -1155,9 +1156,9 @@ void i810_reclaim_buffers(drm_device_t *dev, pid_t pid)
 	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
-	   
+
 		if (buf->pid == pid && buf_priv) {
-			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, 
+			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
 					   I810_BUF_FREE);
 
 			if (used == I810_BUF_CLIENT)
@@ -1178,14 +1179,15 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		  ret	= 0;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
 		return -EINVAL;
 	}
-   
+
    	DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
 		  lock.context, current->pid, dev->lock.hw_lock->lock,
 		  lock.flags);
@@ -1211,7 +1213,7 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
 			}
-			
+
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -1225,9 +1227,8 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->state = TASK_RUNNING;
 		remove_wait_queue(&dev->lock.lock_queue, &entry);
 	}
-	
+
 	if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -1236,7 +1237,7 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
 		if (lock.flags & _DRM_LOCK_QUIESCENT) {
 		   DRM_DEBUG("_DRM_LOCK_QUIESCENT\n");
 		   DRM_DEBUG("fred\n");
@@ -1247,12 +1248,12 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	return ret;
 }
 
-int i810_flush_ioctl(struct inode *inode, struct file *filp, 
+int i810_flush_ioctl(struct inode *inode, struct file *filp,
 		     unsigned int cmd, unsigned long arg)
 {
    	drm_file_t	  *priv	  = filp->private_data;
    	drm_device_t	  *dev	  = priv->dev;
-   
+
    	DRM_DEBUG("i810_flush_ioctl\n");
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_flush_ioctl called without lock held\n");
@@ -1272,12 +1273,12 @@ int i810_dma_vertex(struct inode *inode, struct file *filp,
 	drm_device_dma_t *dma = dev->dma;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
       	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 	drm_i810_vertex_t vertex;
 
-	copy_from_user_ret(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex),
-			   -EFAULT);
+	if (copy_from_user(&vertex, (drm_i810_vertex_t *)arg, sizeof(vertex)))
+		return -EFAULT;
 
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_dma_vertex called without lock held\n");
@@ -1287,15 +1288,15 @@ int i810_dma_vertex(struct inode *inode, struct file *filp,
 	DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
 		  vertex.idx, vertex.used, vertex.discard);
 
-	i810_dma_dispatch_vertex( dev, 
-				  dma->buflist[ vertex.idx ], 
+	i810_dma_dispatch_vertex( dev,
+				  dma->buflist[ vertex.idx ],
 				  vertex.discard, vertex.used );
 
    	atomic_add(vertex.used, &dma->total_bytes);
 	atomic_inc(&dma->total_dmas);
 	sarea_priv->last_enqueue = dev_priv->counter-1;
    	sarea_priv->last_dispatch = (int) hw_status[5];
-   
+
 	return 0;
 }
 
@@ -1308,16 +1309,16 @@ int i810_clear_bufs(struct inode *inode, struct file *filp,
 	drm_device_t *dev = priv->dev;
 	drm_i810_clear_t clear;
 
-   	copy_from_user_ret(&clear, (drm_i810_clear_t *)arg, sizeof(clear), 
-			   -EFAULT);
-   
+   	if (copy_from_user(&clear, (drm_i810_clear_t *)arg, sizeof(clear)))
+		return -EFAULT;
+
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_clear_bufs called without lock held\n");
 		return -EINVAL;
 	}
 
-	i810_dma_dispatch_clear( dev, clear.flags, 
-				 clear.clear_color, 
+	i810_dma_dispatch_clear( dev, clear.flags,
+				 clear.clear_color,
 				 clear.clear_depth );
    	return 0;
 }
@@ -1327,7 +1328,7 @@ int i810_swap_bufs(struct inode *inode, struct file *filp,
 {
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev = priv->dev;
-   
+
 	DRM_DEBUG("i810_swap_bufs\n");
 
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
@@ -1346,8 +1347,8 @@ int i810_getage(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	    = priv->dev;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
       	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 
       	sarea_priv->last_dispatch = (int) hw_status[5];
 	return 0;
@@ -1362,17 +1363,18 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_i810_dma_t	  d;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
    	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 
 	DRM_DEBUG("getbuf\n");
-   	copy_from_user_ret(&d, (drm_i810_dma_t *)arg, sizeof(d), -EFAULT);
-   
+   	if (copy_from_user(&d, (drm_i810_dma_t *)arg, sizeof(d)))
+		return -EFAULT;
+
 	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_dma called without lock held\n");
 		return -EINVAL;
 	}
-	
+
 	d.granted = 0;
 
 	retcode = i810_dma_get_buffer(dev, &d, filp);
@@ -1380,7 +1382,8 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
 		  current->pid, retcode, d.granted);
 
-	copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);   
+	if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
+		return -EFAULT;
    	sarea_priv->last_dispatch = (int) hw_status[5];
 
 	return retcode;
@@ -1394,8 +1397,8 @@ int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_i810_copy_t	  d;
    	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
    	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *) 
-     					dev_priv->sarea_priv; 
+   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
+     					dev_priv->sarea_priv;
 	drm_buf_t *buf;
 	drm_i810_buf_priv_t *buf_priv;
 	drm_device_dma_t *dma = dev->dma;
@@ -1404,15 +1407,17 @@ int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
 		DRM_ERROR("i810_dma called without lock held\n");
 		return -EINVAL;
 	}
-   
-   	copy_from_user_ret(&d, (drm_i810_copy_t *)arg, sizeof(d), -EFAULT);
+
+   	if (copy_from_user(&d, (drm_i810_copy_t *)arg, sizeof(d)))
+		return -EFAULT;
 
 	if(d.idx > dma->buf_count) return -EINVAL;
 	buf = dma->buflist[ d.idx ];
    	buf_priv = buf->dev_private;
 	if (buf_priv->currently_mapped != I810_BUF_MAPPED) return -EPERM;
 
-   	copy_from_user_ret(buf_priv->virtual, d.address, d.used, -EFAULT);
+   	if (copy_from_user(buf_priv->virtual, d.address, d.used))
+		return -EFAULT;
 
    	sarea_priv->last_dispatch = (int) hw_status[5];
 
diff --git a/linux/i810_drv.c b/linux/i810_drv.c
index 18168605..86d5e230 100644
--- a/linux/i810_drv.c
+++ b/linux/i810_drv.c
@@ -1,6 +1,6 @@
 /* i810_drv.c -- I810 driver -*- linux-c -*-
  * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
- * 
+ *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -35,7 +35,7 @@
 
 #define I810_NAME	 "i810"
 #define I810_DESC	 "Intel I810"
-#define I810_DATE	 "20000719"
+#define I810_DATE	 "20000910"
 #define I810_MAJOR	 1
 #define I810_MINOR	 1
 #define I810_PATCHLEVEL	 0
@@ -143,7 +143,7 @@ __setup("i810=", i810_options);
 static int i810_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -188,22 +188,22 @@ static int i810_setup(drm_device_t *dev)
 #endif
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
 	dev->buf_async	  = NULL;
 	init_waitqueue_head(&dev->buf_readers);
 	init_waitqueue_head(&dev->buf_writers);
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -218,15 +218,15 @@ static int i810_takedown(drm_device_t *dev)
 	DRM_DEBUG("\n");
 
 	if (dev->irq) i810_irq_uninstall(dev);
-	
+
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -244,7 +244,7 @@ static int i810_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until r128_cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -254,10 +254,10 @@ static int i810_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
 	}
@@ -269,7 +269,7 @@ static int i810_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -305,7 +305,7 @@ static int i810_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->queuelist) {
 		for (i = 0; i < dev->queue_count; i++) {
 			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
@@ -331,7 +331,7 @@ static int i810_takedown(drm_device_t *dev)
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -348,7 +348,7 @@ static int i810_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(i810);
 #endif
@@ -402,7 +402,7 @@ static void i810_cleanup(void)
 	drm_device_t	      *dev = &i810_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&i810_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -428,17 +428,18 @@ int i810_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))          \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = I810_MAJOR;
@@ -449,10 +450,10 @@ int i810_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, I810_DATE);
 	DRM_COPY(version.desc, I810_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -460,7 +461,7 @@ int i810_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &i810_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -497,7 +498,7 @@ int i810_release(struct inode *inode, struct file *filp)
 		drm_lock_free(dev,
 			      &dev->lock.hw_lock->lock,
 			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		
+
 				/* FIXME: may require heavy-handed reset of
                                    hardware at this point, possibly
                                    processed via a callback to the X
@@ -518,7 +519,7 @@ int i810_release(struct inode *inode, struct file *filp)
 				dev->lock.lock_time = jiffies;
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
-			}			
+			}
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -544,7 +545,7 @@ int i810_release(struct inode *inode, struct file *filp)
 	if (priv->next) priv->next->prev = priv->prev;
 	else		dev->file_last	 = priv->prev;
 	up(&dev->struct_sem);
-	
+
 	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
 #if LINUX_VERSION_CODE < 0x020333
 	MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
@@ -584,7 +585,7 @@ int i810_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -604,7 +605,7 @@ int i810_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -616,8 +617,9 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -641,9 +643,7 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->histo.lhld[drm_histogram_slot(get_cycles()
 						       - dev->lck_start)]);
 #endif
-	
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux/ioctl.c b/linux/ioctl.c
index b246f76e..2f4286b1 100644
--- a/linux/ioctl.c
+++ b/linux/ioctl.c
@@ -38,13 +38,15 @@ int drm_irq_busid(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_irq_busid_t p;
 	struct pci_dev	*dev;
 
-	copy_from_user_ret(&p, (drm_irq_busid_t *)arg, sizeof(p), -EFAULT);
+	if (copy_from_user(&p, (drm_irq_busid_t *)arg, sizeof(p)))
+		return -EFAULT;
 	dev = pci_find_slot(p.busnum, PCI_DEVFN(p.devnum, p.funcnum));
 	if (dev) p.irq = dev->irq;
 	else	 p.irq = 0;
 	DRM_DEBUG("%d:%d:%d => IRQ %d\n",
 		  p.busnum, p.devnum, p.funcnum, p.irq);
-	copy_to_user_ret((drm_irq_busid_t *)arg, &p, sizeof(p), -EFAULT);
+	if (copy_to_user((drm_irq_busid_t *)arg, &p, sizeof(p)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -55,13 +57,15 @@ int drm_getunique(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	 *dev	 = priv->dev;
 	drm_unique_t	 u;
 
-	copy_from_user_ret(&u, (drm_unique_t *)arg, sizeof(u), -EFAULT);
+	if (copy_from_user(&u, (drm_unique_t *)arg, sizeof(u)))
+		return -EFAULT;
 	if (u.unique_len >= dev->unique_len) {
-		copy_to_user_ret(u.unique, dev->unique, dev->unique_len,
-				 -EFAULT);
+		if (copy_to_user(u.unique, dev->unique, dev->unique_len))
+			return -EFAULT;
 	}
 	u.unique_len = dev->unique_len;
-	copy_to_user_ret((drm_unique_t *)arg, &u, sizeof(u), -EFAULT);
+	if (copy_to_user((drm_unique_t *)arg, &u, sizeof(u)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -72,15 +76,19 @@ int drm_setunique(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	 *dev	 = priv->dev;
 	drm_unique_t	 u;
 
-	if (dev->unique_len || dev->unique) return -EBUSY;
+	if (dev->unique_len || dev->unique)
+		return -EBUSY;
 
-	copy_from_user_ret(&u, (drm_unique_t *)arg, sizeof(u), -EFAULT);
-	if (!u.unique_len) return -EINVAL;
+	if (copy_from_user(&u, (drm_unique_t *)arg, sizeof(u)))
+		return -EFAULT;
+
+	if (!u.unique_len)
+		return -EINVAL;
 	
 	dev->unique_len = u.unique_len;
 	dev->unique	= drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
-	copy_from_user_ret(dev->unique, u.unique, dev->unique_len,
-			   -EFAULT);
+	if (copy_from_user(dev->unique, u.unique, dev->unique_len))
+		return -EFAULT;
 	dev->unique[dev->unique_len] = '\0';
 
 	dev->devname = drm_alloc(strlen(dev->name) + strlen(dev->unique) + 2,
diff --git a/linux/lock.c b/linux/lock.c
index 33b2cc03..e5fd435f 100644
--- a/linux/lock.c
+++ b/linux/lock.c
@@ -218,7 +218,8 @@ int drm_finish(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	DRM_DEBUG("\n");
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 	ret = drm_flush_block_and_flush(dev, lock.context, lock.flags);
 	drm_flush_unblock(dev, lock.context, lock.flags);
 	return ret;
diff --git a/linux/mga_bufs.c b/linux/mga_bufs.c
index b97eb495..3ec28a76 100644
--- a/linux/mga_bufs.c
+++ b/linux/mga_bufs.c
@@ -57,10 +57,10 @@ int mga_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	count = request.count;
 	order = drm_order(request.size);
@@ -173,10 +173,10 @@ int mga_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = entry->buf_count;
 	request.size  = size;
    
-	copy_to_user_ret((drm_buf_desc_t *)arg,
+	if (copy_to_user((drm_buf_desc_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
    
 	atomic_dec(&dev->buf_alloc);
 
@@ -219,10 +219,10 @@ int mga_addbufs_pci(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	count	   = request.count;
 	order	   = drm_order(request.size);
@@ -348,10 +348,10 @@ int mga_addbufs_pci(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = entry->buf_count;
 	request.size  = size;
 
-	copy_to_user_ret((drm_buf_desc_t *)arg,
+	if (copy_to_user((drm_buf_desc_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 	
 	atomic_dec(&dev->buf_alloc);
 	return 0;
@@ -362,10 +362,10 @@ int mga_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_buf_desc_t	 request;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	if(request.flags & _DRM_AGP_BUFFER)
 		return mga_addbufs_agp(inode, filp, cmd, arg);
@@ -393,10 +393,10 @@ int mga_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_info_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 		if (dma->bufs[i].buf_count) ++count;
@@ -407,28 +407,26 @@ int mga_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (request.count >= count) {
 		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
 			if (dma->bufs[i].buf_count) {
-				copy_to_user_ret(&request.list[count].count,
+				if (copy_to_user(&request.list[count].count,
 						 &dma->bufs[i].buf_count,
 						 sizeof(dma->bufs[0]
-							.buf_count),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].size,
+							.buf_count)) ||
+				    copy_to_user(&request.list[count].size,
 						 &dma->bufs[i].buf_size,
-						 sizeof(dma->bufs[0].buf_size),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count].low_mark,
+						 sizeof(dma->bufs[0].buf_size)) ||
+				    copy_to_user(&request.list[count].low_mark,
 						 &dma->bufs[i]
 						 .freelist.low_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.low_mark),
-						 -EFAULT);
-				copy_to_user_ret(&request.list[count]
+							.freelist.low_mark)) ||
+				    copy_to_user(&request.list[count]
 						 .high_mark,
 						 &dma->bufs[i]
 						 .freelist.high_mark,
 						 sizeof(dma->bufs[0]
-							.freelist.high_mark),
-						 -EFAULT);
+							.freelist.high_mark)))
+					return -EFAULT;
+
 				DRM_DEBUG("%d %d %d %d %d\n",
 					  i,
 					  dma->bufs[i].buf_count,
@@ -441,10 +439,10 @@ int mga_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	request.count = count;
 
-	copy_to_user_ret((drm_buf_info_t *)arg,
+	if (copy_to_user((drm_buf_info_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 	
 	return 0;
 }
@@ -461,10 +459,10 @@ int mga_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d, %d, %d\n",
 		  request.size, request.low_mark, request.high_mark);
@@ -496,17 +494,17 @@ int mga_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_free_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("%d\n", request.count);
 	for (i = 0; i < request.count; i++) {
-		copy_from_user_ret(&idx,
+		if (copy_from_user(&idx,
 				   &request.list[i],
-				   sizeof(idx),
-				   -EFAULT);
+				   sizeof(idx)))
+			return -EFAULT;
 		if (idx < 0 || idx >= dma->buf_count) {
 			DRM_ERROR("Index %d (of %d max)\n",
 				  idx, dma->buf_count - 1);
@@ -550,10 +548,10 @@ int mga_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_map_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("mga_mapbufs\n");
    	DRM_DEBUG("dma->flags : %x\n", dma->flags);
@@ -628,10 +626,10 @@ int mga_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = dma->buf_count;
 	DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
    
-	copy_to_user_ret((drm_buf_map_t *)arg,
+	if (copy_to_user((drm_buf_map_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 
 	DRM_DEBUG("retcode : %d\n", retcode);
 
diff --git a/linux/mga_context.c b/linux/mga_context.c
index 9a73e6c1..43733c14 100644
--- a/linux/mga_context.c
+++ b/linux/mga_context.c
@@ -103,19 +103,21 @@ int mga_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		i;
 
 	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
+		return -EFAULT;
 	if (res.count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 			ctx.handle = i;
-			copy_to_user_ret(&res.contexts[i],
+			if (copy_to_user(&res.contexts[i],
 					 &i,
-					 sizeof(i),
-					 -EFAULT);
+					 sizeof(i)))
+				return -EFAULT;
 		}
 	}
 	res.count = DRM_RESERVED_CONTEXTS;
-	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -126,7 +128,8 @@ int mga_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	if ((ctx.handle = mga_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Skip kernel's context and get a new one. */
 		ctx.handle = mga_alloc_queue(dev);
@@ -137,7 +140,8 @@ int mga_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 		return -ENOMEM;
 	}
 	DRM_DEBUG("%d\n", ctx.handle);
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -153,10 +157,12 @@ int mga_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
 	/* This is 0, because we don't hanlde any context flags */
 	ctx.flags = 0;
-	copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -167,7 +173,8 @@ int mga_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	return mga_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -179,7 +186,8 @@ int mga_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	mga_context_switch_complete(dev, ctx.handle);
 
@@ -193,7 +201,8 @@ int mga_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
       	if(ctx.handle != DRM_KERNEL_CONTEXT) {
 	   	drm_ctxbitmap_free(dev, ctx.handle);
diff --git a/linux/mga_dma.c b/linux/mga_dma.c
index d315954d..f80fb489 100644
--- a/linux/mga_dma.c
+++ b/linux/mga_dma.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -51,7 +51,7 @@ static int mga_flush_queue(drm_device_t *dev);
 static unsigned long mga_alloc_page(drm_device_t *dev)
 {
 	unsigned long address;
-   
+
 	DRM_DEBUG("%s\n", __FUNCTION__);
 	address = __get_free_page(GFP_KERNEL);
 	if(address == 0UL) {
@@ -59,7 +59,7 @@ static unsigned long mga_alloc_page(drm_device_t *dev)
 	}
 	atomic_inc(&virt_to_page(address)->count);
 	set_bit(PG_locked, &virt_to_page(address)->flags);
-   
+
 	return address;
 }
 
@@ -82,19 +82,6 @@ static void mga_delay(void)
    	return;
 }
 
-#ifdef __i386__
-void mga_flush_write_combine(void)
-{
-   	int xchangeDummy;
-	DRM_DEBUG("%s\n", __FUNCTION__);
-
-   	__asm__ volatile(" push %%eax ; xchg %%eax, %0 ; pop %%eax" : : "m" (xchangeDummy));
-   	__asm__ volatile(" push %%eax ; push %%ebx ; push %%ecx ; push %%edx ;"
-			 " movl $0,%%eax ; cpuid ; pop %%edx ; pop %%ecx ; pop %%ebx ;"
-			 " pop %%eax" : /* no outputs */ :  /* no inputs */ );
-}
-#endif
-
 /* These are two age tags that will never be sent to
  * the hardware */
 #define MGA_BUF_USED 	0xffffffff
@@ -115,7 +102,7 @@ static int mga_freelist_init(drm_device_t *dev)
 	if(dev_priv->head == NULL) return -ENOMEM;
    	memset(dev_priv->head, 0, sizeof(drm_mga_freelist_t));
    	dev_priv->head->age = MGA_BUF_USED;
-   
+
    	for (i = 0; i < dma->buf_count; i++) {
 	   	buf = dma->buflist[ i ];
 	        buf_priv = buf->dev_private;
@@ -135,7 +122,7 @@ static int mga_freelist_init(drm_device_t *dev)
 		buf_priv->dispatched = 0;
 	   	dev_priv->head->next = item;
 	}
-   
+
    	return 0;
 }
 
@@ -153,7 +140,7 @@ static void mga_freelist_cleanup(drm_device_t *dev)
 	   	item = item->next;
 	   	drm_free(prev, sizeof(drm_mga_freelist_t), DRM_MEM_DRIVER);
 	}
-   
+
    	dev_priv->head = dev_priv->tail = NULL;
 }
 
@@ -169,15 +156,15 @@ static inline void mga_dma_quiescent(drm_device_t *dev)
 	DRM_DEBUG("%s\n", __FUNCTION__);
 	end = jiffies + (HZ*3);
     	while(1) {
-		if(!test_and_set_bit(MGA_IN_DISPATCH, 
+		if(!test_and_set_bit(MGA_IN_DISPATCH,
 				     &dev_priv->dispatch_status)) {
 			break;
 		}
 	   	if((signed)(end - jiffies) <= 0) {
-			DRM_ERROR("irqs: %d wanted %d\n", 
-				  atomic_read(&dev->total_irq), 
+			DRM_ERROR("irqs: %d wanted %d\n",
+				  atomic_read(&dev->total_irq),
 				  atomic_read(&dma->total_lost));
-			DRM_ERROR("lockup\n"); 
+			DRM_ERROR("lockup\n");
 			goto out_nolock;
 		}
 		for (i = 0 ; i < 2000 ; i++) mga_delay();
@@ -186,13 +173,13 @@ static inline void mga_dma_quiescent(drm_device_t *dev)
     	DRM_DEBUG("quiescent status : %x\n", MGA_READ(MGAREG_STATUS));
     	while((MGA_READ(MGAREG_STATUS) & 0x00030001) != 0x00020000) {
 		if((signed)(end - jiffies) <= 0) {
-			DRM_ERROR("irqs: %d wanted %d\n", 
-				  atomic_read(&dev->total_irq), 
+			DRM_ERROR("irqs: %d wanted %d\n",
+				  atomic_read(&dev->total_irq),
 				  atomic_read(&dma->total_lost));
-			DRM_ERROR("lockup\n"); 
+			DRM_ERROR("lockup\n");
 			goto out_status;
 		}
-		for (i = 0 ; i < 2000 ; i++) mga_delay();	  
+		for (i = 0 ; i < 2000 ; i++) mga_delay();
 	}
     	sarea_priv->dirty |= MGA_DMA_FLUSH;
 
@@ -216,13 +203,13 @@ static void mga_reset_freelist(drm_device_t *dev)
 }
 
 /* Least recently used :
- * These operations are not atomic b/c they are protected by the 
+ * These operations are not atomic b/c they are protected by the
  * hardware lock */
 
 drm_buf_t *mga_freelist_get(drm_device_t *dev)
 {
    	DECLARE_WAITQUEUE(entry, current);
-   	drm_mga_private_t *dev_priv = 
+   	drm_mga_private_t *dev_priv =
      		(drm_mga_private_t *) dev->dev_private;
 	drm_mga_freelist_t *prev;
    	drm_mga_freelist_t *next;
@@ -230,17 +217,17 @@ drm_buf_t *mga_freelist_get(drm_device_t *dev)
 
 	DRM_DEBUG("%s : tail->age : %d last_prim_age : %d\n", __FUNCTION__,
 	       dev_priv->tail->age, dev_priv->last_prim_age);
-   
+
 	if(failed >= 1000 && dev_priv->tail->age >= dev_priv->last_prim_age) {
-		DRM_DEBUG("I'm waiting on the freelist!!! %d\n", 
+		DRM_DEBUG("I'm waiting on the freelist!!! %d\n",
 		       dev_priv->last_prim_age);
 	   	set_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status);
 		current->state = TASK_INTERRUPTIBLE;
 	   	add_wait_queue(&dev_priv->buf_queue, &entry);
 	   	for (;;) {
 		   	mga_dma_schedule(dev, 0);
-		   	if(!test_bit(MGA_IN_GETBUF, 
-				     &dev_priv->dispatch_status)) 
+		   	if(!test_bit(MGA_IN_GETBUF,
+				     &dev_priv->dispatch_status))
 				break;
 		   	atomic_inc(&dev->total_sleeps);
 		   	schedule();
@@ -253,7 +240,7 @@ drm_buf_t *mga_freelist_get(drm_device_t *dev)
 	   	current->state = TASK_RUNNING;
 	   	remove_wait_queue(&dev_priv->buf_queue, &entry);
 	}
-   
+
    	if(dev_priv->tail->age < dev_priv->last_prim_age) {
 		prev = dev_priv->tail->prev;
 	   	next = dev_priv->tail;
@@ -272,7 +259,7 @@ failed_getbuf:
 
 int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf)
 {
-      	drm_mga_private_t *dev_priv = 
+      	drm_mga_private_t *dev_priv =
      		(drm_mga_private_t *) dev->dev_private;
    	drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 	drm_mga_freelist_t *prev;
@@ -303,7 +290,7 @@ int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf)
 		next->prev = head;
 		next->next = prev;
 	}
-   
+
    	return 0;
 }
 
@@ -315,41 +302,41 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
    	int offset = init->reserved_map_agpstart;
 
 	DRM_DEBUG("%s\n", __FUNCTION__);
-   	dev_priv->primary_size = ((init->primary_size + PAGE_SIZE - 1) / 
+   	dev_priv->primary_size = ((init->primary_size + PAGE_SIZE - 1) /
 				  PAGE_SIZE) * PAGE_SIZE;
    	size_of_buf = dev_priv->primary_size / MGA_NUM_PRIM_BUFS;
 	dev_priv->warp_ucode_size = init->warp_ucode_size;
-   	dev_priv->prim_bufs = drm_alloc(sizeof(drm_mga_prim_buf_t *) * 
-					(MGA_NUM_PRIM_BUFS + 1), 
+   	dev_priv->prim_bufs = drm_alloc(sizeof(drm_mga_prim_buf_t *) *
+					(MGA_NUM_PRIM_BUFS + 1),
 					DRM_MEM_DRIVER);
    	if(dev_priv->prim_bufs == NULL) {
 		DRM_ERROR("Unable to allocate memory for prim_buf\n");
 		return -ENOMEM;
 	}
-   	memset(dev_priv->prim_bufs, 
+   	memset(dev_priv->prim_bufs,
 	       0, sizeof(drm_mga_prim_buf_t *) * (MGA_NUM_PRIM_BUFS + 1));
-   
+
    	temp = init->warp_ucode_size + dev_priv->primary_size;
 	temp = ((temp + PAGE_SIZE - 1) / PAGE_SIZE) * PAGE_SIZE;
-	   
-	dev_priv->ioremap = drm_ioremap(dev->agp->base + offset, 
+
+	dev_priv->ioremap = drm_ioremap(dev->agp->base + offset,
 					temp);
 	if(dev_priv->ioremap == NULL) {
 		DRM_DEBUG("Ioremap failed\n");
 		return -ENOMEM;
 	}
    	init_waitqueue_head(&dev_priv->wait_queue);
-   
+
    	for(i = 0; i < MGA_NUM_PRIM_BUFS; i++) {
-	   	prim_buffer = drm_alloc(sizeof(drm_mga_prim_buf_t), 
+	   	prim_buffer = drm_alloc(sizeof(drm_mga_prim_buf_t),
 					DRM_MEM_DRIVER);
 	   	if(prim_buffer == NULL) return -ENOMEM;
 	   	memset(prim_buffer, 0, sizeof(drm_mga_prim_buf_t));
 	   	prim_buffer->phys_head = offset + dev->agp->base;
-	   	prim_buffer->current_dma_ptr = 
-			prim_buffer->head = 
-			(u32 *) (dev_priv->ioremap + 
-				 offset - 
+	   	prim_buffer->current_dma_ptr =
+			prim_buffer->head =
+			(u32 *) (dev_priv->ioremap +
+				 offset -
 				 init->reserved_map_agpstart);
 	   	prim_buffer->num_dwords = 0;
 	   	prim_buffer->max_dwords = size_of_buf / sizeof(u32);
@@ -361,11 +348,11 @@ static int mga_init_primary_bufs(drm_device_t *dev, drm_mga_init_t *init)
 	   	dev_priv->prim_bufs[i] = prim_buffer;
 	}
 	dev_priv->current_prim_idx = 0;
-        dev_priv->next_prim = 
-		dev_priv->last_prim = 
+        dev_priv->next_prim =
+		dev_priv->last_prim =
 		dev_priv->current_prim =
         	dev_priv->prim_bufs[0];
-	dev_priv->next_prim_age = 2;	
+	dev_priv->next_prim_age = 2;
 	dev_priv->last_prim_age = 1;
    	set_bit(MGA_BUF_IN_USE, &dev_priv->current_prim->buffer_status);
    	return 0;
@@ -384,11 +371,11 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 
    	DRM_DEBUG("%s\n", __FUNCTION__);
    	dev_priv->last_prim = prim;
-   
+
  	/* We never check for overflow, b/c there is always room */
     	PRIMPTR(prim);
    	if(num_dwords <= 0) {
-		DRM_DEBUG("num_dwords == 0 when dispatched\n");
+		DRM_ERROR("num_dwords == 0 when dispatched\n");
 		goto out_prim_wait;
 	}
  	PRIMOUTREG( MGAREG_DMAPAD, 0);
@@ -399,17 +386,17 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 
 	end = jiffies + (HZ*3);
     	if(sarea_priv->dirty & MGA_DMA_FLUSH) {
-		DRM_DEBUG("Dma top flush\n");	   
+		DRM_DEBUG("Dma top flush\n");
 		while((MGA_READ(MGAREG_STATUS) & 0x00030001) != 0x00020000) {
 			if((signed)(end - jiffies) <= 0) {
-				DRM_ERROR("irqs: %d wanted %d\n", 
-					  atomic_read(&dev->total_irq), 
+				DRM_ERROR("irqs: %d wanted %d\n",
+					  atomic_read(&dev->total_irq),
 					  atomic_read(&dma->total_lost));
 				DRM_ERROR("lockup in fire primary "
 					  "(Dma Top Flush)\n");
 				goto out_prim_wait;
 			}
-	      
+
 			for (i = 0 ; i < 4096 ; i++) mga_delay();
 		}
 		sarea_priv->dirty &= ~(MGA_DMA_FLUSH);
@@ -417,29 +404,27 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 		DRM_DEBUG("Status wait\n");
 		while((MGA_READ(MGAREG_STATUS) & 0x00020001) != 0x00020000) {
 			if((signed)(end - jiffies) <= 0) {
-				DRM_ERROR("irqs: %d wanted %d\n", 
-					  atomic_read(&dev->total_irq), 
+				DRM_ERROR("irqs: %d wanted %d\n",
+					  atomic_read(&dev->total_irq),
 					  atomic_read(&dma->total_lost));
 				DRM_ERROR("lockup in fire primary "
 					  "(Status Wait)\n");
 				goto out_prim_wait;
 			}
-	   
+
 			for (i = 0 ; i < 4096 ; i++) mga_delay();
 		}
 	}
 
-#ifdef __i386__
    	mga_flush_write_combine();
-#endif
     	atomic_inc(&dev_priv->pending_bufs);
        	MGA_WRITE(MGAREG_PRIMADDRESS, phys_head | TT_GENERAL);
  	MGA_WRITE(MGAREG_PRIMEND, (phys_head + num_dwords * 4) | use_agp);
    	prim->num_dwords = 0;
 	sarea_priv->last_enqueue = prim->prim_age;
-    
+
    	next_idx = prim->idx + 1;
-    	if(next_idx >= MGA_NUM_PRIM_BUFS) 
+    	if(next_idx >= MGA_NUM_PRIM_BUFS)
 		next_idx = 0;
 
     	dev_priv->next_prim = dev_priv->prim_bufs[next_idx];
@@ -462,28 +447,28 @@ int mga_advance_primary(drm_device_t *dev)
    	drm_device_dma_t  *dma      = dev->dma;
    	int next_prim_idx;
    	int ret = 0;
-   
+
    	/* This needs to reset the primary buffer if available,
 	 * we should collect stats on how many times it bites
 	 * it's tail */
 	DRM_DEBUG("%s\n", __FUNCTION__);
-   
+
    	next_prim_idx = dev_priv->current_prim_idx + 1;
    	if(next_prim_idx >= MGA_NUM_PRIM_BUFS)
      		next_prim_idx = 0;
    	prim_buffer = dev_priv->prim_bufs[next_prim_idx];
 	set_bit(MGA_IN_WAIT, &dev_priv->dispatch_status);
-   
+
       	/* In use is cleared in interrupt handler */
-   
+
    	if(test_and_set_bit(MGA_BUF_IN_USE, &prim_buffer->buffer_status)) {
 	   	add_wait_queue(&dev_priv->wait_queue, &entry);
 		current->state = TASK_INTERRUPTIBLE;
 
 	   	for (;;) {
 		   	mga_dma_schedule(dev, 0);
-		   	if(!test_and_set_bit(MGA_BUF_IN_USE, 
-					     &prim_buffer->buffer_status)) 
+		   	if(!test_and_set_bit(MGA_BUF_IN_USE,
+					     &prim_buffer->buffer_status))
 				break;
 		   	atomic_inc(&dev->total_sleeps);
 		   	atomic_inc(&dma->total_missed_sched);
@@ -545,9 +530,9 @@ static inline int mga_decide_to_fire(drm_device_t *dev)
 	   	atomic_inc(&dma->total_prio);
 	   	return 1;
 	}
-   
+
    	if(atomic_read(&dev_priv->pending_bufs) <= MGA_NUM_PRIM_BUFS - 1) {
-		if(test_bit(MGA_BUF_SWAP_PENDING, 
+		if(test_bit(MGA_BUF_SWAP_PENDING,
 			    &dev_priv->next_prim->buffer_status)) {
 			atomic_inc(&dma->total_dmas);
 			return 1;
@@ -583,16 +568,16 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 		retval = -EBUSY;
 		goto sch_out_wakeup;
 	}
-   
+
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-   	if(test_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status) || 
+   	if(test_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status) ||
 	   test_bit(MGA_IN_WAIT, &dev_priv->dispatch_status) ||
 	   test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status)) {
 		locked = 1;
 	}
-   
-   	if (!locked && 
+
+   	if (!locked &&
 	    !drm_lock_take(&dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) {
 	   	atomic_inc(&dma->total_missed_lock);
 	   	clear_bit(0, &dev->dma_flag);
@@ -606,7 +591,7 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 	   	/* Fire dma buffer */
 	   	if(mga_decide_to_fire(dev)) {
 		   	DRM_DEBUG("idx :%d\n", dev_priv->next_prim->idx);
-			clear_bit(MGA_BUF_FORCE_FIRE, 
+			clear_bit(MGA_BUF_FORCE_FIRE,
 				  &dev_priv->next_prim->buffer_status);
 		   	if(dev_priv->current_prim == dev_priv->next_prim) {
 				/* Schedule overflow for a later time */
@@ -620,7 +605,7 @@ int mga_dma_schedule(drm_device_t *dev, int locked)
 	} else {
 		DRM_DEBUG("I can't get the dispatch lock\n");
 	}
-   	
+
 	if (!locked) {
 		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
 				  DRM_KERNEL_CONTEXT)) {
@@ -642,8 +627,8 @@ sch_out_wakeup:
 		DRM_DEBUG("Waking up buf queue\n");
 		wake_up_interruptible(&dev_priv->buf_queue);
 	} else if (test_bit(MGA_IN_GETBUF, &dev_priv->dispatch_status)) {
-	   	DRM_DEBUG("Not waking buf_queue on %d %d\n", 
-			  atomic_read(&dev->total_irq), 
+	   	DRM_DEBUG("Not waking buf_queue on %d %d\n",
+			  atomic_read(&dev->total_irq),
 			  dev_priv->last_prim_age);
 	}
 
@@ -664,7 +649,7 @@ static void mga_dma_service(int irq, void *device, struct pt_regs *regs)
    	last_prim_buffer = dev_priv->last_prim;
     	last_prim_buffer->num_dwords = 0;
     	last_prim_buffer->sec_used = 0;
-	dev_priv->sarea_priv->last_dispatch = 
+	dev_priv->sarea_priv->last_dispatch =
 		dev_priv->last_prim_age = last_prim_buffer->prim_age;
       	clear_bit(MGA_BUF_IN_USE, &last_prim_buffer->buffer_status);
    	wake_up_interruptible(&dev_priv->wait_queue);
@@ -686,12 +671,12 @@ int mga_dma_cleanup(drm_device_t *dev)
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
 	if(dev->dev_private) {
-		drm_mga_private_t *dev_priv = 
+		drm_mga_private_t *dev_priv =
 			(drm_mga_private_t *) dev->dev_private;
-      
+
 		if(dev_priv->ioremap) {
-			int temp = (dev_priv->warp_ucode_size + 
-				    dev_priv->primary_size + 
+			int temp = (dev_priv->warp_ucode_size +
+				    dev_priv->primary_size +
 				    PAGE_SIZE - 1) / PAGE_SIZE * PAGE_SIZE;
 
 			drm_ioremapfree((void *) dev_priv->ioremap, temp);
@@ -712,7 +697,7 @@ int mga_dma_cleanup(drm_device_t *dev)
 				}
 			}
 		   	drm_free(dev_priv->prim_bufs, sizeof(void *) *
-				 (MGA_NUM_PRIM_BUFS + 1), 
+				 (MGA_NUM_PRIM_BUFS + 1),
 				 DRM_MEM_DRIVER);
 		}
 		if(dev_priv->head != NULL) {
@@ -720,7 +705,7 @@ int mga_dma_cleanup(drm_device_t *dev)
 		}
 
 
-		drm_free(dev->dev_private, sizeof(drm_mga_private_t), 
+		drm_free(dev->dev_private, sizeof(drm_mga_private_t),
 			 DRM_MEM_DRIVER);
 		dev->dev_private = NULL;
 	}
@@ -747,12 +732,12 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		DRM_DEBUG("reserved_map or buffer_map are invalid\n");
 		return -EINVAL;
 	}
-   
+
 	dev_priv->reserved_map_idx = init->reserved_map_idx;
 	dev_priv->buffer_map_idx = init->buffer_map_idx;
 	sarea_map = dev->maplist[0];
-	dev_priv->sarea_priv = (drm_mga_sarea_t *) 
-		((u8 *)sarea_map->handle + 
+	dev_priv->sarea_priv = (drm_mga_sarea_t *)
+		((u8 *)sarea_map->handle +
 		 init->sarea_priv_offset);
 
 	/* Scale primary size to the next page */
@@ -770,20 +755,21 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
    	init_waitqueue_head(&dev_priv->flush_queue);
 	init_waitqueue_head(&dev_priv->buf_queue);
 	dev_priv->WarpPipe = 0xff000000;
+	dev_priv->vertexsize = 0;
 
    	DRM_DEBUG("chipset: %d ucode_size: %d backOffset: %x depthOffset: %x\n",
-		  dev_priv->chipset, dev_priv->warp_ucode_size, 
+		  dev_priv->chipset, dev_priv->warp_ucode_size,
 		  dev_priv->backOffset, dev_priv->depthOffset);
    	DRM_DEBUG("cpp: %d sgram: %d stride: %d maccess: %x\n",
-		  dev_priv->cpp, dev_priv->sgram, dev_priv->stride, 
+		  dev_priv->cpp, dev_priv->sgram, dev_priv->stride,
 		  dev_priv->mAccess);
-   
-	memcpy(&dev_priv->WarpIndex, &init->WarpIndex, 
+
+	memcpy(&dev_priv->WarpIndex, &init->WarpIndex,
 	       sizeof(drm_mga_warp_index_t) * MGA_MAX_WARP_PIPES);
 
-   	for (i = 0 ; i < MGA_MAX_WARP_PIPES ; i++) 
+   	for (i = 0 ; i < MGA_MAX_WARP_PIPES ; i++)
 		DRM_DEBUG("warp pipe %d: installed: %d phys: %lx size: %x\n",
-			  i, 
+			  i,
 			  dev_priv->WarpIndex[i].installed,
 			  dev_priv->WarpIndex[i].phys_addr,
 			  dev_priv->WarpIndex[i].size);
@@ -800,7 +786,7 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		return -ENOMEM;
 	}
 
-   	dev_priv->status_page = 
+   	dev_priv->status_page =
 		ioremap_nocache(virt_to_bus((void *)dev_priv->real_status_page),
 				PAGE_SIZE);
 
@@ -811,15 +797,15 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 	}
 
    	/* Write status page when secend or softrap occurs */
-   	MGA_WRITE(MGAREG_PRIMPTR, 
+   	MGA_WRITE(MGAREG_PRIMPTR,
 		  virt_to_bus((void *)dev_priv->real_status_page) | 0x00000003);
-      
+
 
 	/* Private is now filled in, initialize the hardware */
 	{
 		PRIMLOCALS;
 		PRIMGETPTR( dev_priv );
-	   	   
+
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
 		PRIMOUTREG(MGAREG_DWGSYNC, 0x0100);
@@ -827,15 +813,13 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		/* Poll for the first buffer to insure that
 		 * the status register will be correct
 		 */
-	   
-#ifdef __i386__
+
 		mga_flush_write_combine();
-#endif
 	   	MGA_WRITE(MGAREG_PRIMADDRESS, phys_head | TT_GENERAL);
 
-		MGA_WRITE(MGAREG_PRIMEND, ((phys_head + num_dwords * 4) | 
+		MGA_WRITE(MGAREG_PRIMEND, ((phys_head + num_dwords * 4) |
 					   PDEA_pagpxfer_enable));
-	   
+
 	   	while(MGA_READ(MGAREG_DWGSYNC) != 0x0100) ;
 	}
 
@@ -853,11 +837,12 @@ int mga_dma_init(struct inode *inode, struct file *filp,
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev = priv->dev;
 	drm_mga_init_t init;
-   
+
    	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	copy_from_user_ret(&init, (drm_mga_init_t *)arg, sizeof(init), -EFAULT);
-   
+	if (copy_from_user(&init, (drm_mga_init_t *)arg, sizeof(init)))
+		return -EFAULT;
+
 	switch(init.func) {
 	case MGA_INIT_DMA:
 		return mga_dma_initialize(dev, &init);
@@ -873,7 +858,7 @@ int mga_irq_install(drm_device_t *dev, int irq)
 	int retcode;
 
 	if (!irq)     return -EINVAL;
-	
+
 	down(&dev->struct_sem);
 	if (dev->irq) {
 		up(&dev->struct_sem);
@@ -881,7 +866,7 @@ int mga_irq_install(drm_device_t *dev, int irq)
 	}
 	dev->irq = irq;
 	up(&dev->struct_sem);
-	
+
 	DRM_DEBUG("install irq handler %d\n", irq);
 
 	dev->context_flag     = 0;
@@ -922,7 +907,7 @@ int mga_irq_uninstall(drm_device_t *dev)
 	irq	 = dev->irq;
 	dev->irq = 0;
 	up(&dev->struct_sem);
-	
+
 	if (!irq) return -EINVAL;
    	DRM_DEBUG("remove irq handler %d\n", irq);
       	MGA_WRITE(MGAREG_ICLEAR, 0x00000001);
@@ -937,8 +922,9 @@ int mga_control(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_file_t	*priv	= filp->private_data;
 	drm_device_t	*dev	= priv->dev;
 	drm_control_t	ctl;
-   
-	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
+
+	if (copy_from_user(&ctl, (drm_control_t *)arg, sizeof(ctl)))
+		return -EFAULT;
 
    	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -963,21 +949,21 @@ static int mga_flush_queue(drm_device_t *dev)
    	if(dev_priv == NULL) {
 	   	return 0;
 	}
-   
+
    	if(dev_priv->next_prim->num_dwords != 0) {
    		current->state = TASK_INTERRUPTIBLE;
    		add_wait_queue(&dev_priv->flush_queue, &entry);
 		set_bit(MGA_IN_FLUSH, &dev_priv->dispatch_status);
 		mga_dma_schedule(dev, 0);
    		for (;;) {
-	   		if (!test_bit(MGA_IN_FLUSH, 
-				      &dev_priv->dispatch_status)) 
+	   		if (!test_bit(MGA_IN_FLUSH,
+				      &dev_priv->dispatch_status))
 				break;
 		   	atomic_inc(&dev->total_sleeps);
 	      		schedule();
 	      		if (signal_pending(current)) {
 		   		ret = -EINTR; /* Can't restart */
-				clear_bit(MGA_IN_FLUSH, 
+				clear_bit(MGA_IN_FLUSH,
 					  &dev_priv->dispatch_status);
 		   		break;
 			}
@@ -1005,11 +991,11 @@ void mga_reclaim_buffers(drm_device_t *dev, pid_t pid)
 	   	drm_buf_t *buf = dma->buflist[ i ];
 	   	drm_mga_buf_priv_t *buf_priv = buf->dev_private;
 
-		/* Only buffers that need to get reclaimed ever 
-		 * get set to free 
+		/* Only buffers that need to get reclaimed ever
+		 * get set to free
 		 */
 		if (buf->pid == pid  && buf_priv) {
-			if(buf_priv->my_freelist->age == MGA_BUF_USED) 
+			if(buf_priv->my_freelist->age == MGA_BUF_USED)
 		     		buf_priv->my_freelist->age = MGA_BUF_FREE;
 		}
 	}
@@ -1025,14 +1011,15 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_lock_t	  lock;
 
 	DRM_DEBUG("%s\n", __FUNCTION__);
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
 		return -EINVAL;
 	}
-   
+
    	DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
 	       lock.context, current->pid, dev->lock.hw_lock->lock,
 	       lock.flags);
@@ -1040,7 +1027,7 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	if (lock.context < 0) {
 		return -EINVAL;
 	}
-   
+
 	/* Only one queue:
 	 */
 
@@ -1059,7 +1046,7 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
 			}
-			
+
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -1072,9 +1059,8 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->state = TASK_RUNNING;
 		remove_wait_queue(&dev->lock.lock_queue, &entry);
 	}
-	
+
 	if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -1083,19 +1069,19 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
 		if (lock.flags & _DRM_LOCK_QUIESCENT) {
 		   DRM_DEBUG("_DRM_LOCK_QUIESCENT\n");
 		   mga_flush_queue(dev);
 		   mga_dma_quiescent(dev);
 		}
 	}
-   
+
 	DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
 	return ret;
 }
-		
-int mga_flush_ioctl(struct inode *inode, struct file *filp, 
+
+int mga_flush_ioctl(struct inode *inode, struct file *filp,
 		    unsigned int cmd, unsigned long arg)
 {
        	drm_file_t	  *priv	  = filp->private_data;
@@ -1104,7 +1090,8 @@ int mga_flush_ioctl(struct inode *inode, struct file *filp,
       	drm_mga_private_t *dev_priv = (drm_mga_private_t *)dev->dev_private;
 
    	DRM_DEBUG("%s\n", __FUNCTION__);
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("mga_flush_ioctl called without lock held\n");
diff --git a/linux/mga_drm.h b/linux/mga_drm.h
index e75e91a4..52cf7766 100644
--- a/linux/mga_drm.h
+++ b/linux/mga_drm.h
@@ -73,17 +73,19 @@
 
 /* 3d state excluding texture units:
  */
-#define MGA_CTXREG_DSTORG   0	/* validated */
-#define MGA_CTXREG_MACCESS  1	
-#define MGA_CTXREG_PLNWT    2	
-#define MGA_CTXREG_DWGCTL    3	
-#define MGA_CTXREG_ALPHACTRL 4
-#define MGA_CTXREG_FOGCOLOR  5
-#define MGA_CTXREG_WFLAG     6
-#define MGA_CTXREG_TDUAL0    7
-#define MGA_CTXREG_TDUAL1    8
-#define MGA_CTXREG_FCOL      9
-#define MGA_CTX_SETUP_SIZE   10
+#define MGA_CTXREG_DSTORG     0	/* validated */
+#define MGA_CTXREG_MACCESS    1	
+#define MGA_CTXREG_PLNWT      2 	
+#define MGA_CTXREG_DWGCTL     3	
+#define MGA_CTXREG_ALPHACTRL  4
+#define MGA_CTXREG_FOGCOLOR   5
+#define MGA_CTXREG_WFLAG      6
+#define MGA_CTXREG_TDUAL0     7
+#define MGA_CTXREG_TDUAL1     8
+#define MGA_CTXREG_FCOL       9
+#define MGA_CTXREG_STENCIL    10
+#define MGA_CTXREG_STENCILCTL 11
+#define MGA_CTX_SETUP_SIZE    12
 
 /* 2d state
  */
@@ -233,6 +235,7 @@ typedef struct _drm_mga_sarea {
 	/* Mechanism to validate card state.
 	 */
    	int ctxOwner;
+   	int vertexsize;
 } drm_mga_sarea_t;	
 
 /* Device specific ioctls:
@@ -241,6 +244,8 @@ typedef struct _drm_mga_clear {
 	unsigned int clear_color;
 	unsigned int clear_depth;
 	unsigned int flags;
+	unsigned int clear_depth_mask;
+	unsigned int clear_color_mask;
 } drm_mga_clear_t;
 
 typedef struct _drm_mga_swap {
diff --git a/linux/mga_drv.c b/linux/mga_drv.c
index a4a8fe55..c551ba6e 100644
--- a/linux/mga_drv.c
+++ b/linux/mga_drv.c
@@ -1,6 +1,6 @@
 /* mga_drv.c -- Matrox g200/g400 driver -*- linux-c -*-
  * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.com
- * 
+ *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -35,9 +35,9 @@
 #include "mga_drv.h"
 
 #define MGA_NAME	 "mga"
-#define MGA_DESC	 "Matrox g200/g400"
-#define MGA_DATE	 "20000719"
-#define MGA_MAJOR	 1
+#define MGA_DESC	 "Matrox G200/G400"
+#define MGA_DATE	 "20000910"
+#define MGA_MAJOR	 2
 #define MGA_MINOR	 0
 #define MGA_PATCHLEVEL	 0
 
@@ -123,7 +123,7 @@ static char		      *mga = NULL;
 #endif
 
 MODULE_AUTHOR("VA Linux Systems, Inc.");
-MODULE_DESCRIPTION("Matrox g200/g400");
+MODULE_DESCRIPTION("Matrox G200/G400");
 MODULE_PARM(mga, "s");
 
 #ifndef MODULE
@@ -144,7 +144,7 @@ __setup("mga=", mga_options);
 static int mga_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -187,22 +187,22 @@ static int mga_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
 	dev->buf_async	  = NULL;
 	init_waitqueue_head(&dev->buf_readers);
 	init_waitqueue_head(&dev->buf_writers);
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -217,15 +217,15 @@ static int mga_takedown(drm_device_t *dev)
 	DRM_DEBUG("\n");
 
 	if (dev->irq) mga_irq_uninstall(dev);
-	
+
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -243,7 +243,7 @@ static int mga_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -253,10 +253,10 @@ static int mga_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
 	}
@@ -268,7 +268,7 @@ static int mga_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -304,7 +304,7 @@ static int mga_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->queuelist) {
 		for (i = 0; i < dev->queue_count; i++) {
 			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
@@ -330,7 +330,7 @@ static int mga_takedown(drm_device_t *dev)
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -347,7 +347,7 @@ static int mga_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(mga);
 #endif
@@ -407,7 +407,7 @@ static void mga_cleanup(void)
 	drm_device_t	      *dev = &mga_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&mga_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -419,7 +419,7 @@ static void mga_cleanup(void)
 #ifdef CONFIG_MTRR
    	if(dev->agp && dev->agp->agp_mtrr) {
 	   	int retval;
-	   	retval = mtrr_del(dev->agp->agp_mtrr, 
+	   	retval = mtrr_del(dev->agp->agp_mtrr,
 				  dev->agp->agp_info.aper_base,
 				  dev->agp->agp_info.aper_size * 1024*1024);
 	   	DRM_DEBUG("mtrr_del = %d\n", retval);
@@ -444,17 +444,18 @@ int mga_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = MGA_MAJOR;
@@ -465,10 +466,10 @@ int mga_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, MGA_DATE);
 	DRM_COPY(version.desc, MGA_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -476,7 +477,7 @@ int mga_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &mga_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -513,7 +514,7 @@ int mga_release(struct inode *inode, struct file *filp)
 		drm_lock_free(dev,
 			      &dev->lock.hw_lock->lock,
 			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
-		
+
 				/* FIXME: may require heavy-handed reset of
                                    hardware at this point, possibly
                                    processed via a callback to the X
@@ -534,7 +535,7 @@ int mga_release(struct inode *inode, struct file *filp)
 				dev->lock.lock_time = jiffies;
 				atomic_inc(&dev->total_locks);
 				break;	/* Got lock */
-			}			
+			}
 				/* Contention */
 			atomic_inc(&dev->total_sleeps);
 			current->state = TASK_INTERRUPTIBLE;
@@ -560,7 +561,7 @@ int mga_release(struct inode *inode, struct file *filp)
 	if (priv->next) priv->next->prev = priv->prev;
 	else		dev->file_last	 = priv->prev;
 	up(&dev->struct_sem);
-	
+
 	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
 #if LINUX_VERSION_CODE < 0x020333
 	MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
@@ -601,7 +602,7 @@ int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -621,7 +622,7 @@ int mga_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -633,8 +634,9 @@ int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -655,8 +657,6 @@ int mga_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	   DRM_ERROR("\n");
 	}
 
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux/mga_drv.h b/linux/mga_drv.h
index f49bd0f6..6feba09a 100644
--- a/linux/mga_drv.h
+++ b/linux/mga_drv.h
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -82,6 +82,7 @@ typedef struct _drm_mga_private {
 	int use_agp;
    	drm_mga_warp_index_t WarpIndex[MGA_MAX_G400_PIPES];
 	unsigned int WarpPipe;
+	unsigned int vertexsize;
    	atomic_t pending_bufs;
    	void *status_page;
    	unsigned long real_status_page;
@@ -97,7 +98,7 @@ typedef struct _drm_mga_private {
       	wait_queue_head_t wait_queue;	/* Processes waiting until interrupt */
 	wait_queue_head_t buf_queue;    /* Processes waiting for a free buf */
 	/* Some validated register values:
-	 */	
+	 */
 	u32 mAccess;
 } drm_mga_private_t;
 
@@ -128,7 +129,6 @@ extern int mga_dma_init(struct inode *inode, struct file *filp,
 extern int mga_dma_cleanup(drm_device_t *dev);
 extern int mga_flush_ioctl(struct inode *inode, struct file *filp,
 			   unsigned int cmd, unsigned long arg);
-extern void mga_flush_write_combine(void);
 extern unsigned int mga_create_sync_tag(drm_device_t *dev);
 extern drm_buf_t *mga_freelist_get(drm_device_t *dev);
 extern int mga_freelist_put(drm_device_t *dev, drm_buf_t *buf);
@@ -137,9 +137,9 @@ extern void mga_reclaim_buffers(drm_device_t *dev, pid_t pid);
 
 
 				/* mga_bufs.c */
-extern int  mga_addbufs(struct inode *inode, struct file *filp, 
+extern int  mga_addbufs(struct inode *inode, struct file *filp,
 			unsigned int cmd, unsigned long arg);
-extern int  mga_infobufs(struct inode *inode, struct file *filp, 
+extern int  mga_infobufs(struct inode *inode, struct file *filp,
 			 unsigned int cmd, unsigned long arg);
 extern int  mga_markbufs(struct inode *inode, struct file *filp,
 			 unsigned int cmd, unsigned long arg);
@@ -179,6 +179,7 @@ extern int  mga_rmctx(struct inode *inode, struct file *filp,
 extern int  mga_context_switch(drm_device_t *dev, int old, int new);
 extern int  mga_context_switch_complete(drm_device_t *dev, int new);
 
+#define mga_flush_write_combine()	mb()
 
 typedef enum {
 	TT_GENERAL,
@@ -201,7 +202,7 @@ typedef struct {
 #define ISREG0(r)	(r >= DWGREG0 && r <= DWGREG0_END)
 #define ADRINDEX0(r)	(u8)((r - DWGREG0) >> 2)
 #define ADRINDEX1(r)	(u8)(((r - DWGREG1) >> 2) | 0x80)
-#define ADRINDEX(r)	(ISREG0(r) ? ADRINDEX0(r) : ADRINDEX1(r)) 
+#define ADRINDEX(r)	(ISREG0(r) ? ADRINDEX0(r) : ADRINDEX1(r))
 
 #define MGA_VERBOSE 0
 #define MGA_NUM_PRIM_BUFS 	8
@@ -212,13 +213,12 @@ typedef struct {
 #define PRIM_OVERFLOW(dev, dev_priv, length) do {			   \
 	drm_mga_prim_buf_t *tmp_buf =					   \
  		dev_priv->prim_bufs[dev_priv->current_prim_idx];	   \
-	if( test_bit(MGA_BUF_NEEDS_OVERFLOW,				   \
-		  &tmp_buf->buffer_status)) {				   \
+	if( test_bit(MGA_BUF_NEEDS_OVERFLOW, &tmp_buf->buffer_status)) {   \
  		mga_advance_primary(dev);				   \
  		mga_dma_schedule(dev, 1);				   \
 		tmp_buf = dev_priv->prim_bufs[dev_priv->current_prim_idx]; \
  	} else if( tmp_buf->max_dwords - tmp_buf->num_dwords < length ||   \
- 	    tmp_buf->sec_used > MGA_DMA_BUF_NR/2) {			   \
+ 	           tmp_buf->sec_used > MGA_DMA_BUF_NR/2) {		   \
 		set_bit(MGA_BUF_FORCE_FIRE, &tmp_buf->buffer_status);	   \
  		mga_advance_primary(dev);				   \
  		mga_dma_schedule(dev, 1);				   \
@@ -295,7 +295,7 @@ drm_mga_prim_buf_t *tmp_buf = 					\
 		       num_dwords + 1 + outcount, ADRINDEX(reg), val);	\
 	if( ++outcount == 4) {						\
 		outcount = 0;						\
-		dma_ptr[0] = *(u32 *)tempIndex;				\
+		dma_ptr[0] = *(unsigned long *)tempIndex;		\
 		dma_ptr+=5;						\
 		num_dwords += 5;					\
 	}								\
@@ -396,8 +396,8 @@ drm_mga_prim_buf_t *tmp_buf = 					\
 #define DC_atype_zi 				0x30
 #define DC_atype_blk 				0x40
 #define DC_atype_i 				0x70
-#define DC_linear_xy 				0x0 		
-#define DC_linear_linear 			0x80 		
+#define DC_linear_xy 				0x0
+#define DC_linear_linear 			0x80
 #define DC_zmode_nozcmp 			0x0
 #define DC_zmode_ze 				0x200
 #define DC_zmode_zne 				0x300
@@ -405,16 +405,16 @@ drm_mga_prim_buf_t *tmp_buf = 					\
 #define DC_zmode_zlte 				0x500
 #define DC_zmode_zgt 				0x600
 #define DC_zmode_zgte 				0x700
-#define DC_solid_disable 			0x0 		
-#define DC_solid_enable 			0x800 		
-#define DC_arzero_disable 			0x0 		
-#define DC_arzero_enable 			0x1000 		
-#define DC_sgnzero_disable 			0x0 		
-#define DC_sgnzero_enable 			0x2000 		
-#define DC_shftzero_disable 			0x0 		
-#define DC_shftzero_enable 			0x4000 		
-#define DC_bop_SHIFT 				16 		
-#define DC_trans_SHIFT 				20 		
+#define DC_solid_disable 			0x0
+#define DC_solid_enable 			0x800
+#define DC_arzero_disable 			0x0
+#define DC_arzero_enable 			0x1000
+#define DC_sgnzero_disable 			0x0
+#define DC_sgnzero_enable 			0x2000
+#define DC_shftzero_disable 			0x0
+#define DC_shftzero_enable 			0x4000
+#define DC_bop_SHIFT 				16
+#define DC_trans_SHIFT 				20
 #define DC_bltmod_bmonolef 			0x0
 #define DC_bltmod_bmonowf 			0x8000000
 #define DC_bltmod_bplan 			0x2000000
@@ -423,21 +423,21 @@ drm_mga_prim_buf_t *tmp_buf = 					\
 #define DC_bltmod_bu32rgb 			0xe000000
 #define DC_bltmod_bu24bgr 			0x16000000
 #define DC_bltmod_bu24rgb 			0x1e000000
-#define DC_pattern_disable 			0x0 		
-#define DC_pattern_enable 			0x20000000 	
-#define DC_transc_disable 			0x0 		
-#define DC_transc_enable 			0x40000000 	
-#define DC_clipdis_disable 			0x0 		
-#define DC_clipdis_enable 			0x80000000 	
+#define DC_pattern_disable 			0x0
+#define DC_pattern_enable 			0x20000000
+#define DC_transc_disable 			0x0
+#define DC_transc_enable 			0x40000000
+#define DC_clipdis_disable 			0x0
+#define DC_clipdis_enable 			0x80000000
 
-#define SETADD_mode_vertlist                   	0x0 	
+#define SETADD_mode_vertlist                   	0x0
 
 
 #define MGA_CLEAR_CMD (DC_opcod_trap | DC_arzero_enable | 		\
 		       DC_sgnzero_enable | DC_shftzero_enable | 	\
 		       (0xC << DC_bop_SHIFT) | DC_clipdis_enable | 	\
 		       DC_solid_enable | DC_transc_enable)
-	  
+
 
 #define MGA_COPY_CMD (DC_opcod_bitblt | DC_atype_rpl | DC_linear_xy |	\
 		      DC_solid_disable | DC_arzero_disable | 		\
diff --git a/linux/mga_state.c b/linux/mga_state.c
index 5a9c7632..0c2f5729 100644
--- a/linux/mga_state.c
+++ b/linux/mga_state.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -38,13 +38,13 @@
  * change these values
  */
 
-#define MGAEMITCLIP_SIZE 10
-#define MGAEMITCTX_SIZE 15
-#define MGAG200EMITTEX_SIZE 20
-#define MGAG400EMITTEX0_SIZE 30
-#define MGAG400EMITTEX1_SIZE 25
-#define MGAG400EMITPIPE_SIZE 50
-#define MGAG200EMITPIPE_SIZE 15
+#define MGAEMITCLIP_SIZE	10
+#define MGAEMITCTX_SIZE		20
+#define MGAG200EMITTEX_SIZE 	20
+#define MGAG400EMITTEX0_SIZE	30
+#define MGAG400EMITTEX1_SIZE	25
+#define MGAG400EMITPIPE_SIZE	55
+#define MGAG200EMITPIPE_SIZE	15
 
 #define MAX_STATE_SIZE ((MGAEMITCLIP_SIZE * MGA_NR_SAREA_CLIPRECTS) + \
 			MGAEMITCTX_SIZE + MGAG400EMITTEX0_SIZE + \
@@ -89,7 +89,7 @@ static void mgaEmitContext(drm_mga_private_t * dev_priv)
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	/* This takes a max of 15 dwords */
+	/* This takes a max of 20 dwords */
 	PRIMGETPTR(dev_priv);
 
 	PRIMOUTREG(MGAREG_DSTORG, regs[MGA_CTXREG_DSTORG]);
@@ -107,6 +107,11 @@ static void mgaEmitContext(drm_mga_private_t * dev_priv)
 		PRIMOUTREG(MGAREG_TDUALSTAGE0, regs[MGA_CTXREG_TDUAL0]);
 		PRIMOUTREG(MGAREG_TDUALSTAGE1, regs[MGA_CTXREG_TDUAL1]);
 		PRIMOUTREG(MGAREG_FCOL, regs[MGA_CTXREG_FCOL]);
+
+		PRIMOUTREG(MGAREG_STENCIL, regs[MGA_CTXREG_STENCIL]);
+		PRIMOUTREG(MGAREG_STENCILCTL, regs[MGA_CTXREG_STENCILCTL]);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
 	} else {
 		PRIMOUTREG(MGAREG_FCOL, regs[MGA_CTXREG_FCOL]);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -151,11 +156,13 @@ static void mgaG200EmitTex(drm_mga_private_t * dev_priv)
 	PRIMADVANCE(dev_priv);
 }
 
+#define TMC_dualtex_enable 		0x80
+
 static void mgaG400EmitTex0(drm_mga_private_t * dev_priv)
 {
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 	unsigned int *regs = sarea_priv->TexState[0];
-	int multitex = sarea_priv->WarpPipe & MGA_T2;
+	int multitex = regs[MGA_TEXREG_CTL2] & TMC_dualtex_enable;
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -183,7 +190,7 @@ static void mgaG400EmitTex0(drm_mga_private_t * dev_priv)
 	PRIMOUTREG(0x2d00 + 61 * 4, 0);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 
-	if (!multitex) {
+	if (!multitex || 1) {
 		PRIMOUTREG(0x2d00 + 52 * 4, 0x40);
 		PRIMOUTREG(0x2d00 + 60 * 4, 0x40);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -200,10 +207,10 @@ static void mgaG400EmitTex0(drm_mga_private_t * dev_priv)
 
 #define TMC_map1_enable 		0x80000000
 
-static void mgaG400EmitTex1(drm_mga_private_t * dev_priv)
+static void mgaG400EmitTex1(drm_mga_private_t * dev_priv, int source )
 {
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
-	unsigned int *regs = sarea_priv->TexState[1];
+	unsigned int *regs = sarea_priv->TexState[source];
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -245,6 +252,8 @@ static void mgaG400EmitPipe(drm_mga_private_t * dev_priv)
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 	unsigned int pipe = sarea_priv->WarpPipe;
 	float fParam = 12800.0f;
+	int multitex = (sarea_priv->TexState[0][MGA_TEXREG_CTL2] &
+			TMC_dualtex_enable);
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -252,14 +261,36 @@ static void mgaG400EmitPipe(drm_mga_private_t * dev_priv)
 
 	/* This takes 50 dwords */
 
-	/* Establish vertex size.  
+	/* Establish vertex size.
 	 */
 	PRIMOUTREG(MGAREG_WIADDR2, WIA_wmode_suspend);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 
-	if (pipe & MGA_T2) {
+	if (sarea_priv->vertexsize == 10) {
+		PRIMOUTREG(MGAREG_YDST, 0);
+		PRIMOUTREG(MGAREG_FXLEFT, 0);
+		PRIMOUTREG(MGAREG_FXRIGHT, 1);
+		PRIMOUTREG(MGAREG_DWGCTL, MGA_FLUSH_CMD);
+
+		PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 1);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
+		PRIMOUTREG(MGAREG_DWGSYNC, 0x7000);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
+
+		if (multitex) {
+			PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
+			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
+			PRIMOUTREG(MGAREG_TEXCTL2, 0x80 | 0x00008000);
+			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
+		} else {
+			PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
+			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
+			PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
+			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
+		}
+
 		PRIMOUTREG(MGAREG_WVRTXSZ, 0x00001e09);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -270,23 +301,21 @@ static void mgaG400EmitPipe(drm_mga_private_t * dev_priv)
 		PRIMOUTREG(MGAREG_WACCEPTSEQ, 0);
 		PRIMOUTREG(MGAREG_WACCEPTSEQ, 0x1e000000);
 	} else {
-		if (dev_priv->WarpPipe & MGA_T2) {
-			/* Flush the WARP pipe */
-			PRIMOUTREG(MGAREG_YDST, 0);
-			PRIMOUTREG(MGAREG_FXLEFT, 0);
-			PRIMOUTREG(MGAREG_FXRIGHT, 1);
-			PRIMOUTREG(MGAREG_DWGCTL, MGA_FLUSH_CMD);
-
-			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 1);
-			PRIMOUTREG(MGAREG_DMAPAD, 0);
-			PRIMOUTREG(MGAREG_DWGSYNC, 0x7000);
-			PRIMOUTREG(MGAREG_DMAPAD, 0);
+		/* Flush the WARP pipe */
+		PRIMOUTREG(MGAREG_YDST, 0);
+		PRIMOUTREG(MGAREG_FXLEFT, 0);
+		PRIMOUTREG(MGAREG_FXRIGHT, 1);
+		PRIMOUTREG(MGAREG_DWGCTL, MGA_FLUSH_CMD);
 
-			PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
-			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
-			PRIMOUTREG(MGAREG_TEXCTL2, 0x80 | 0x00008000);
-			PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
-		}
+		PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 1);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
+		PRIMOUTREG(MGAREG_DWGSYNC, 0x7000);
+		PRIMOUTREG(MGAREG_DMAPAD, 0);
+
+		PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
+		PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
+		PRIMOUTREG(MGAREG_TEXCTL2, 0 | 0x00008000);
+		PRIMOUTREG(MGAREG_LEN + MGAREG_MGA_EXEC, 0);
 
 		PRIMOUTREG(MGAREG_WVRTXSZ, 0x00001807);
 		PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -314,13 +343,16 @@ static void mgaG400EmitPipe(drm_mga_private_t * dev_priv)
 	PRIMOUTREG(0x2d00 + 52 * 4, 0x40);	/* Tex stage 1 : w */
 	PRIMOUTREG(0x2d00 + 60 * 4, 0x40);	/* Tex stage 1 : h */
 
-	/* Dma pading required due to hw bug */
-	PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
-	PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
-	PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
-	PRIMOUTREG(MGAREG_WIADDR2,
-		   (u32) (dev_priv->WarpIndex[pipe].
-			  phys_addr | WIA_wmode_start | WIA_wagp_agp));
+	if (dev_priv->WarpPipe != pipe || 1) {
+		/* Dma pading required due to hw bug */
+		PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
+		PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
+		PRIMOUTREG(MGAREG_DMAPAD, 0xffffffff);
+		PRIMOUTREG(MGAREG_WIADDR2,
+			   (u32) (dev_priv->WarpIndex[pipe].phys_addr |
+				  WIA_wmode_start | WIA_wagp_agp));
+	}
+
 	PRIMADVANCE(dev_priv);
 }
 
@@ -363,11 +395,20 @@ static void mgaEmitState(drm_mga_private_t * dev_priv)
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
 	if (dev_priv->chipset == MGA_CARD_TYPE_G400) {
-		int multitex = sarea_priv->WarpPipe & MGA_T2;
+	        int multitex = (sarea_priv->TexState[0][MGA_TEXREG_CTL2] &
+				TMC_dualtex_enable);
 
-		if (sarea_priv->WarpPipe != dev_priv->WarpPipe) {
+  		dirty = ~0;
+
+		if (dirty & MGA_UPLOAD_PIPE
+/*  		    && (sarea_priv->WarpPipe != dev_priv->WarpPipe || */
+/*  		        sarea_priv->vertexsize != dev_priv->vertexsize) */
+		   )
+		{
 			mgaG400EmitPipe(dev_priv);
 			dev_priv->WarpPipe = sarea_priv->WarpPipe;
+			dev_priv->vertexsize = sarea_priv->vertexsize;
+			sarea_priv->dirty &= ~MGA_UPLOAD_PIPE;
 		}
 
 		if (dirty & MGA_UPLOAD_CTX) {
@@ -380,8 +421,11 @@ static void mgaEmitState(drm_mga_private_t * dev_priv)
 			sarea_priv->dirty &= ~MGA_UPLOAD_TEX0;
 		}
 
-		if ((dirty & MGA_UPLOAD_TEX1) && multitex) {
-			mgaG400EmitTex1(dev_priv);
+		if (dirty & MGA_UPLOAD_TEX1) {
+			if (multitex)
+				mgaG400EmitTex1(dev_priv, 1);
+			else
+				mgaG400EmitTex1(dev_priv, 0);
 			sarea_priv->dirty &= ~MGA_UPLOAD_TEX1;
 		}
 	} else {
@@ -552,12 +596,15 @@ static void mga_dma_dispatch_vertex(drm_device_t * dev, drm_buf_t * buf)
 
 	if (buf->used) {
 		/* WARNING: if you change any of the state functions verify
-		 * these numbers (Overestimating this doesn't hurt).  
+		 * these numbers (Overestimating this doesn't hurt).
 		 */
 		buf_priv->dispatched = 1;
 		PRIM_OVERFLOW(dev, dev_priv,
 			      (MAX_STATE_SIZE + (5 * MGA_NR_SAREA_CLIPRECTS)));
 		mgaEmitState(dev_priv);
+
+/*  		length = dev_priv->vertexsize * 3 * 4; */
+
 		do {
 			if (i < sarea_priv->nbox) {
 				DRM_DEBUG("idx %d Emit box %d/%d:"
@@ -614,7 +661,7 @@ static void mga_dma_dispatch_indices(drm_device_t * dev,
 
 	if (start != end) {
 		/* WARNING: if you change any of the state functions verify
-		 * these numbers (Overestimating this doesn't hurt).  
+		 * these numbers (Overestimating this doesn't hurt).
 		 */
 		buf_priv->dispatched = 1;
 		PRIM_OVERFLOW(dev, dev_priv,
@@ -644,6 +691,7 @@ static void mga_dma_dispatch_indices(drm_device_t * dev,
 				    SETADD_mode_vertlist));
 			PRIMOUTREG(MGAREG_SETUPEND,
 				   ((address + end) | use_agp));
+/*  				   ((address + start + 12) | use_agp)); */
 			PRIMADVANCE(dev_priv);
 		} while (++i < sarea_priv->nbox);
 	}
@@ -658,7 +706,9 @@ static void mga_dma_dispatch_indices(drm_device_t * dev,
 
 static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 				   unsigned int clear_color,
-				   unsigned int clear_zval)
+				   unsigned int clear_zval,
+				   unsigned int clear_colormask,
+				   unsigned int clear_depthmask)
 {
 	drm_mga_private_t *dev_priv = dev->dev_private;
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
@@ -687,7 +737,7 @@ static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 		if (flags & MGA_FRONT) {
 			DRM_DEBUG("clear front\n");
 			PRIMOUTREG(MGAREG_DMAPAD, 0);
-			PRIMOUTREG(MGAREG_DMAPAD, 0);
+			PRIMOUTREG(MGAREG_PLNWT, clear_colormask);
 			PRIMOUTREG(MGAREG_YDSTLEN,
 				   (pbox[i].y1 << 16) | height);
 			PRIMOUTREG(MGAREG_FXBNDRY,
@@ -702,7 +752,7 @@ static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 		if (flags & MGA_BACK) {
 			DRM_DEBUG("clear back\n");
 			PRIMOUTREG(MGAREG_DMAPAD, 0);
-			PRIMOUTREG(MGAREG_DMAPAD, 0);
+			PRIMOUTREG(MGAREG_PLNWT, clear_colormask);
 			PRIMOUTREG(MGAREG_YDSTLEN,
 				   (pbox[i].y1 << 16) | height);
 			PRIMOUTREG(MGAREG_FXBNDRY,
@@ -717,7 +767,7 @@ static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 		if (flags & MGA_DEPTH) {
 			DRM_DEBUG("clear depth\n");
 			PRIMOUTREG(MGAREG_DMAPAD, 0);
-			PRIMOUTREG(MGAREG_DMAPAD, 0);
+			PRIMOUTREG(MGAREG_PLNWT, clear_depthmask);
 			PRIMOUTREG(MGAREG_YDSTLEN,
 				   (pbox[i].y1 << 16) | height);
 			PRIMOUTREG(MGAREG_FXBNDRY,
@@ -802,8 +852,8 @@ int mga_clear_bufs(struct inode *inode, struct file *filp,
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
 	drm_mga_clear_t clear;
 
-	copy_from_user_ret(&clear, (drm_mga_clear_t *) arg, sizeof(clear),
-			   -EFAULT);
+	if (copy_from_user(&clear, (drm_mga_clear_t *) arg, sizeof(clear)))
+		return -EFAULT;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
@@ -818,11 +868,12 @@ int mga_clear_bufs(struct inode *inode, struct file *filp,
 	 */
 	dev_priv->sarea_priv->dirty |= MGA_UPLOAD_CTX;
 	mga_dma_dispatch_clear(dev, clear.flags,
-			       clear.clear_color, clear.clear_depth);
+			       clear.clear_color,
+			       clear.clear_depth,
+			       clear.clear_color_mask,
+			       clear.clear_depth_mask);
 	PRIMUPDATE(dev_priv);
-#ifdef __i386__
 	mga_flush_write_combine();
-#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -852,9 +903,7 @@ int mga_swap_bufs(struct inode *inode, struct file *filp,
 	PRIMUPDATE(dev_priv);
 	set_bit(MGA_BUF_SWAP_PENDING,
 		&dev_priv->current_prim->buffer_status);
-#ifdef __i386__
 	mga_flush_write_combine();
-#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -875,8 +924,8 @@ int mga_iload(struct inode *inode, struct file *filp,
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
 	DRM_DEBUG("Starting Iload\n");
-	copy_from_user_ret(&iload, (drm_mga_iload_t *) arg, sizeof(iload),
-			   -EFAULT);
+	if (copy_from_user(&iload, (drm_mga_iload_t *) arg, sizeof(iload)))
+		return -EFAULT;
 
 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("mga_iload called without lock held\n");
@@ -902,9 +951,7 @@ int mga_iload(struct inode *inode, struct file *filp,
 	AGEBUF(dev_priv, buf_priv);
 	buf_priv->discard = 1;
 	mga_freelist_put(dev, buf);
-#ifdef __i386__
 	mga_flush_write_combine();
-#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -922,8 +969,8 @@ int mga_vertex(struct inode *inode, struct file *filp,
 	drm_mga_vertex_t vertex;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	copy_from_user_ret(&vertex, (drm_mga_vertex_t *) arg,
-			   sizeof(vertex), -EFAULT);
+	if (copy_from_user(&vertex, (drm_mga_vertex_t *) arg, sizeof(vertex)))
+		return -EFAULT;
 
 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("mga_vertex called without lock held\n");
@@ -952,9 +999,7 @@ int mga_vertex(struct inode *inode, struct file *filp,
 	mga_dma_dispatch_vertex(dev, buf);
 
 	PRIMUPDATE(dev_priv);
-#ifdef __i386__
 	mga_flush_write_combine();
-#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -973,8 +1018,8 @@ int mga_indices(struct inode *inode, struct file *filp,
 	drm_mga_indices_t indices;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	copy_from_user_ret(&indices, (drm_mga_indices_t *) arg,
-			   sizeof(indices), -EFAULT);
+	if (copy_from_user(&indices, (drm_mga_indices_t *) arg, sizeof(indices)))
+		return -EFAULT;
 
 	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("mga_indices called without lock held\n");
@@ -1001,9 +1046,7 @@ int mga_indices(struct inode *inode, struct file *filp,
 	mga_dma_dispatch_indices(dev, buf, indices.start, indices.end);
 
 	PRIMUPDATE(dev_priv);
-#ifdef __i386__
 	mga_flush_write_combine();
-#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -1021,10 +1064,12 @@ static int mga_dma_get_buffers(drm_device_t * dev, drm_dma_t * d)
 		if (!buf)
 			break;
 		buf->pid = current->pid;
-		copy_to_user_ret(&d->request_indices[i],
-				 &buf->idx, sizeof(buf->idx), -EFAULT);
-		copy_to_user_ret(&d->request_sizes[i],
-				 &buf->total, sizeof(buf->total), -EFAULT);
+		if (copy_to_user(&d->request_indices[i],
+				 &buf->idx, sizeof(buf->idx)))
+			return -EFAULT;
+		if (copy_to_user(&d->request_sizes[i],
+				 &buf->total, sizeof(buf->total)))
+			return -EFAULT;
 		++d->granted_count;
 	}
 	return 0;
@@ -1040,7 +1085,8 @@ int mga_dma(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_dma_t d;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	copy_from_user_ret(&d, (drm_dma_t *) arg, sizeof(d), -EFAULT);
+	if (copy_from_user(&d, (drm_dma_t *) arg, sizeof(d)))
+		return -EFAULT;
 	DRM_DEBUG("%d %d: %d send, %d req\n",
 		  current->pid, d.context, d.send_count, d.request_count);
 
@@ -1075,6 +1121,7 @@ int mga_dma(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	DRM_DEBUG("%d returning, granted = %d\n",
 		  current->pid, d.granted_count);
-	copy_to_user_ret((drm_dma_t *) arg, &d, sizeof(d), -EFAULT);
+	if (copy_to_user((drm_dma_t *) arg, &d, sizeof(d)))
+		return -EFAULT;
 	return retcode;
 }
diff --git a/linux/r128_bufs.c b/linux/r128_bufs.c
index bd81dcdc..7e76441e 100644
--- a/linux/r128_bufs.c
+++ b/linux/r128_bufs.c
@@ -60,10 +60,10 @@ int r128_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dma) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	count      = request.count;
 	order      = drm_order(request.size);
@@ -173,10 +173,10 @@ int r128_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = entry->buf_count;
 	request.size  = size;
 
-	copy_to_user_ret((drm_buf_desc_t *)arg,
+	if (copy_to_user((drm_buf_desc_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 
 	dma->flags = _DRM_DMA_USE_AGP;
 
@@ -195,10 +195,10 @@ int r128_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	if (!dev_priv || dev_priv->is_pci) return -EINVAL;
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_desc_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 #if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
 	if (request.flags & _DRM_AGP_BUFFER)
@@ -234,10 +234,10 @@ int r128_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	++dev->buf_use;		/* Can't allocate more after this call */
 	spin_unlock(&dev->count_lock);
 
-	copy_from_user_ret(&request,
+	if (copy_from_user(&request,
 			   (drm_buf_map_t *)arg,
-			   sizeof(request),
-			   -EFAULT);
+			   sizeof(request)))
+		return -EFAULT;
 
 	if (request.count >= dma->buf_count) {
 		if (dma->flags & _DRM_DMA_USE_AGP) {
@@ -300,10 +300,10 @@ int r128_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
 	request.count = dma->buf_count;
 	DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
 
-	copy_to_user_ret((drm_buf_map_t *)arg,
+	if (copy_to_user((drm_buf_map_t *)arg,
 			 &request,
-			 sizeof(request),
-			 -EFAULT);
+			 sizeof(request)))
+		return -EFAULT;
 
 	return retcode;
 }
diff --git a/linux/r128_context.c b/linux/r128_context.c
index 2dd716d4..9cadadba 100644
--- a/linux/r128_context.c
+++ b/linux/r128_context.c
@@ -103,19 +103,21 @@ int r128_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		i;
 
 	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
+		return -EFAULT;
 	if (res.count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 			ctx.handle = i;
-			copy_to_user_ret(&res.contexts[i],
+			if (copy_to_user(&res.contexts[i],
 					 &i,
-					 sizeof(i),
-					 -EFAULT);
+					 sizeof(i)))
+				return -EFAULT;
 		}
 	}
 	res.count = DRM_RESERVED_CONTEXTS;
-	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -127,7 +129,8 @@ int r128_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	if ((ctx.handle = r128_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Skip kernel's context and get a new one. */
 		ctx.handle = r128_alloc_queue(dev);
@@ -139,7 +142,8 @@ int r128_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 		return -ENOMEM;
 	}
 
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -148,7 +152,8 @@ int r128_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
 	if (ctx.flags==_DRM_CONTEXT_PRESERVED)
 		r128_res_ctx.handle=ctx.handle;
 	return 0;
@@ -159,10 +164,12 @@ int r128_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
 	/* This is 0, because we don't hanlde any context flags */
 	ctx.flags = 0;
-	copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -173,7 +180,8 @@ int r128_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	return r128_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -185,7 +193,8 @@ int r128_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	r128_context_switch_complete(dev, ctx.handle);
 
@@ -199,7 +208,8 @@ int r128_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	drm_ctxbitmap_free(dev, ctx.handle);
 
diff --git a/linux/r128_dma.c b/linux/r128_dma.c
index d4b75bed..bcba6782 100644
--- a/linux/r128_dma.c
+++ b/linux/r128_dma.c
@@ -68,26 +68,8 @@ int R128_READ_PLL(drm_device_t *dev, int addr)
 	return R128_READ(R128_CLOCK_CNTL_DATA);
 }
 
-#ifdef __i386__
-static void r128_flush_write_combine(void)
-{
-	int xchangeDummy;
-
-	__asm__ volatile("push %%eax ;"
-			 "xchg %%eax, %0 ;"
-			 "pop %%eax" : : "m" (xchangeDummy));
-	__asm__ volatile("push %%eax ;"
-			 "push %%ebx ;"
-			 "push %%ecx ;"
-			 "push %%edx ;"
-			 "movl $0,%%eax ;"
-			 "cpuid ;"
-			 "pop %%edx ;"
-			 "pop %%ecx ;"
-			 "pop %%ebx ;"
-			 "pop %%eax" : /* no outputs */ :  /* no inputs */ );
-}
-#endif
+#define r128_flush_write_combine()	mb()
+
 
 static void r128_status(drm_device_t *dev)
 {
@@ -213,8 +195,8 @@ int r128_init_cce(struct inode *inode, struct file *filp,
         drm_device_t      *dev    = priv->dev;
 	drm_r128_init_t    init;
 
-	copy_from_user_ret(&init, (drm_r128_init_t *)arg, sizeof(init),
-			   -EFAULT);
+	if (copy_from_user(&init, (drm_r128_init_t *)arg, sizeof(init)))
+		return -EFAULT;
 
 	switch (init.func) {
 	case R128_INIT_CCE:
@@ -498,10 +480,8 @@ static int r128_submit_packets_ring_secure(drm_device_t *dev,
 		   dev_priv->ring_start,
 		   write * sizeof(u32));
 
-#ifdef __i386__
 	/* Make sure WC cache has been flushed */
 	r128_flush_write_combine();
-#endif
 
 	dev_priv->sarea_priv->ring_write = write;
 	R128_WRITE(R128_PM4_BUFFER_DL_WPTR, write);
@@ -603,10 +583,8 @@ static int r128_submit_packets_ring(drm_device_t *dev,
 		   dev_priv->ring_start,
 		   write * sizeof(u32));
 
-#ifdef __i386__
 	/* Make sure WC cache has been flushed */
 	r128_flush_write_combine();
-#endif
 
 	dev_priv->sarea_priv->ring_write = write;
 	R128_WRITE(R128_PM4_BUFFER_DL_WPTR, write);
@@ -686,8 +664,8 @@ int r128_submit_pkt(struct inode *inode, struct file *filp,
 		return -EINVAL;
 	}
 
-	copy_from_user_ret(&packet, (drm_r128_packet_t *)arg, sizeof(packet),
-			   -EFAULT);
+	if (copy_from_user(&packet, (drm_r128_packet_t *)arg, sizeof(packet)))
+		return -EFAULT;
 
 	c    = packet.count;
 	size = c * sizeof(*buffer);
@@ -702,7 +680,8 @@ int r128_submit_pkt(struct inode *inode, struct file *filp,
 		}
 
 		if ((buffer = kmalloc(size, 0)) == NULL) return -ENOMEM;
-		copy_from_user_ret(buffer, packet.buffer, size, -EFAULT);
+		if (copy_from_user(buffer, packet.buffer, size))
+			return -EFAULT;
 
 		if (dev_priv->cce_secure)
 			ret = r128_submit_packets_ring_secure(dev, buffer, &c);
@@ -712,7 +691,8 @@ int r128_submit_pkt(struct inode *inode, struct file *filp,
 		c += left;
 	} else {
 		if ((buffer = kmalloc(size, 0)) == NULL) return -ENOMEM;
-		copy_from_user_ret(buffer, packet.buffer, size, -EFAULT);
+		if (copy_from_user(buffer, packet.buffer, size))
+			return -EFAULT;
 
 		if (dev_priv->cce_secure)
 			ret = r128_submit_packets_pio_secure(dev, buffer, &c);
@@ -723,8 +703,8 @@ int r128_submit_pkt(struct inode *inode, struct file *filp,
 	kfree(buffer);
 
 	packet.count = c;
-	copy_to_user_ret((drm_r128_packet_t *)arg, &packet, sizeof(packet),
-			 -EFAULT);
+	if (copy_to_user((drm_r128_packet_t *)arg, &packet, sizeof(packet)))
+		return -EFAULT;
 
 	if (ret)        return ret;
 	else if (c > 0) return -EAGAIN;
@@ -772,10 +752,8 @@ static int r128_send_vertbufs(drm_device_t *dev, drm_r128_vertex_t *v)
 		r128_mark_vertbufs_done(dev);
 	}
 
-#ifdef __i386__
 	/* Make sure WC cache has been flushed (if in PIO mode) */
 	if (!dev_priv->cce_is_bm_mode) r128_flush_write_combine();
-#endif
 
 	/* FIXME: Add support for sending vertex buffer to the CCE here
 	   instead of in client code.  The v->prim holds the primitive
@@ -863,14 +841,13 @@ static int r128_get_vertbufs(drm_device_t *dev, drm_r128_vertex_t *v)
 		buf = r128_freelist_get(dev);
 		if (!buf) break;
 		buf->pid = current->pid;
-		copy_to_user_ret(&v->request_indices[i],
+		if (copy_to_user(&v->request_indices[i],
 				 &buf->idx,
-				 sizeof(buf->idx),
-				 -EFAULT);
-		copy_to_user_ret(&v->request_sizes[i],
+				 sizeof(buf->idx)) ||
+		    copy_to_user(&v->request_sizes[i],
 				 &buf->total,
-				 sizeof(buf->total),
-				 -EFAULT);
+				 sizeof(buf->total)))
+			return -EFAULT;
 		++v->granted_count;
 	}
 	return 0;
@@ -897,7 +874,8 @@ int r128_vertex_buf(struct inode *inode, struct file *filp, unsigned int cmd,
 		return -EINVAL;
 	}
 
-	copy_from_user_ret(&v, (drm_r128_vertex_t *)arg, sizeof(v), -EFAULT);
+	if (copy_from_user(&v, (drm_r128_vertex_t *)arg, sizeof(v)))
+		return -EFAULT;
 	DRM_DEBUG("%d: %d send, %d req\n",
 		  current->pid, v.send_count, v.request_count);
 
@@ -924,7 +902,8 @@ int r128_vertex_buf(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	DRM_DEBUG("%d returning, granted = %d\n",
 		  current->pid, v.granted_count);
-	copy_to_user_ret((drm_r128_vertex_t *)arg, &v, sizeof(v), -EFAULT);
+	if (copy_to_user((drm_r128_vertex_t *)arg, &v, sizeof(v)))
+		return -EFAULT;
 
 	return retcode;
 }
diff --git a/linux/r128_drv.c b/linux/r128_drv.c
index dd982ab4..b58dcf06 100644
--- a/linux/r128_drv.c
+++ b/linux/r128_drv.c
@@ -35,7 +35,7 @@
 
 #define R128_NAME	 "r128"
 #define R128_DESC	 "ATI Rage 128"
-#define R128_DATE	 "20000827"
+#define R128_DATE	 "20000910"
 #define R128_MAJOR	 1
 #define R128_MINOR	 0
 #define R128_PATCHLEVEL  0
@@ -420,17 +420,18 @@ int r128_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = R128_MAJOR;
@@ -441,10 +442,10 @@ int r128_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, R128_DATE);
 	DRM_COPY(version.desc, R128_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -559,7 +560,8 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         dev->lck_start = start = get_cycles();
 #endif
 
-        copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+        if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
         if (lock.context == DRM_KERNEL_CONTEXT) {
                 DRM_ERROR("Process %d using kernel context %d\n",
@@ -656,7 +658,6 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -665,7 +666,6 @@ int r128_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -700,7 +700,8 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
@@ -729,9 +730,6 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->priority = DEF_PRIORITY;
 	}
 #endif
-
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
diff --git a/linux/sis_drv.c b/linux/sis_drv.c
index 434a1ccd..d5fe8fc0 100644
--- a/linux/sis_drv.c
+++ b/linux/sis_drv.c
@@ -9,11 +9,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -100,7 +100,7 @@ static drm_ioctl_desc_t	      sis_ioctls[] = {
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_INIT)]   = { sis_agp_init,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_ALLOC)]  = { sis_agp_alloc,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_AGP_FREE)]   = { sis_agp_free,	  1, 1 },
-        
+
 #if defined(SIS_STEREO)
 	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]    = { sis_control,	  1, 1 },
         [DRM_IOCTL_NR(SIS_IOCTL_FLIP)]       = { sis_flip,	  1, 1 },
@@ -121,7 +121,7 @@ MODULE_PARM(sis, "s");
 static int sis_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -163,7 +163,7 @@ static int sis_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
@@ -172,15 +172,15 @@ static int sis_setup(drm_device_t *dev)
 	init_waitqueue_head(&dev->buf_writers);
 
 	sis_res_ctx.handle=-1;
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -200,12 +200,12 @@ static int sis_takedown(drm_device_t *dev)
 
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -224,7 +224,7 @@ static int sis_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *entry;
 		drm_agp_mem_t *nexte;
-		
+
 				/* Remove AGP resources, but leave dev->agp
                                    intact until cleanup is called. */
 		for (entry = dev->agp->memory; entry; entry = nexte) {
@@ -234,13 +234,13 @@ static int sis_takedown(drm_device_t *dev)
 			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 		}
 		dev->agp->memory = NULL;
-		
+
 		if (dev->agp->acquired && drm_agp.release)
 			(*drm_agp.release)();
-		
+
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
-	}	
+	}
 #endif
 
 				/* Clear vma list (only built for debugging) */
@@ -251,7 +251,7 @@ static int sis_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -289,14 +289,14 @@ static int sis_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->lock.hw_lock) {
 		dev->lock.hw_lock    = NULL; /* SHM removed */
 		dev->lock.pid	     = 0;
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -313,7 +313,7 @@ int sis_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(sis);
 #endif
@@ -356,7 +356,7 @@ int sis_init(void)
 		 SIS_PATCHLEVEL,
 		 SIS_DATE,
 		 sis_misc.minor);
-	
+
 	return 0;
 }
 
@@ -367,7 +367,7 @@ void sis_cleanup(void)
 	drm_device_t	      *dev = &sis_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&sis_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -378,7 +378,7 @@ void sis_cleanup(void)
 #ifdef CONFIG_MTRR
    	if(dev->agp && dev->agp->agp_mtrr) {
 	   	int retval;
-	   	retval = mtrr_del(dev->agp->agp_mtrr, 
+	   	retval = mtrr_del(dev->agp->agp_mtrr,
 				  dev->agp->agp_info.aper_base,
 				  dev->agp->agp_info.aper_size * 1024*1024);
 	   	DRM_DEBUG("mtrr_del = %d\n", retval);
@@ -433,7 +433,7 @@ int sis_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &sis_device;
 	int	      retcode = 0;
-	       
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
@@ -492,7 +492,7 @@ int sis_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -512,7 +512,7 @@ int sis_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -549,7 +549,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         if (lock.context < 0 || lock.context >= dev->queue_count)
                 return -EINVAL;
 #endif
-        
+
         if (!ret) {
 #if 0
                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
@@ -561,7 +561,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 /* Can't take lock if we just had it and
                                    there is contention. */
                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
-					lock.context, current->pid, j, 
+					lock.context, current->pid, j,
 					dev->lock.lock_time, jiffies);
                                 current->state = TASK_INTERRUPTIBLE;
 				current->policy |= SCHED_YIELD;
@@ -584,7 +584,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 atomic_inc(&dev->total_locks);
                                 break;  /* Got lock */
                         }
-                        
+
                                 /* Contention */
                         atomic_inc(&dev->total_sleeps);
                         current->state = TASK_INTERRUPTIBLE;
@@ -626,7 +626,6 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -635,7 +634,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -652,7 +651,7 @@ int sis_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #if DRM_DMA_HISTOGRAM
         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 #endif
-        
+
         return ret;
 }
 
@@ -665,7 +664,7 @@ int sis_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_lock_t	  lock;
 
 	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -687,9 +686,7 @@ int sis_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		}
 	}
 
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 	unblock_all_signals();
-#endif
 	return 0;
 }
 
diff --git a/linux/tdfx_context.c b/linux/tdfx_context.c
index d6903c0a..1fd73310 100644
--- a/linux/tdfx_context.c
+++ b/linux/tdfx_context.c
@@ -105,19 +105,21 @@ int tdfx_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	int		i;
 
 	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (copy_from_user(&res, (drm_ctx_res_t *)arg, sizeof(res)))
+		return -EFAULT;
 	if (res.count >= DRM_RESERVED_CONTEXTS) {
 		memset(&ctx, 0, sizeof(ctx));
 		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 			ctx.handle = i;
-			copy_to_user_ret(&res.contexts[i],
+			if (copy_to_user(&res.contexts[i],
 					 &i,
-					 sizeof(i),
-					 -EFAULT);
+					 sizeof(i)))
+				return -EFAULT;
 		}
 	}
 	res.count = DRM_RESERVED_CONTEXTS;
-	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	if (copy_to_user((drm_ctx_res_t *)arg, &res, sizeof(res)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -129,7 +131,8 @@ int tdfx_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	if ((ctx.handle = tdfx_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Skip kernel's context and get a new one. */
 		ctx.handle = tdfx_alloc_queue(dev);
@@ -141,7 +144,8 @@ int tdfx_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 		return -ENOMEM;
 	}
    
-	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -150,7 +154,8 @@ int tdfx_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
 	if (ctx.flags==_DRM_CONTEXT_PRESERVED)
 		tdfx_res_ctx.handle=ctx.handle;
 	return 0;
@@ -161,10 +166,12 @@ int tdfx_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
 {
 	drm_ctx_t ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
-	/* This is 0, because we don't hanlde any context flags */
+	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
+		return -EFAULT;
+	/* This is 0, because we don't handle any context flags */
 	ctx.flags = 0;
-	copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
+	if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -175,7 +182,8 @@ int tdfx_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	return tdfx_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -187,7 +195,8 @@ int tdfx_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	*dev	= priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	tdfx_context_switch_complete(dev, ctx.handle);
 
@@ -201,7 +210,8 @@ int tdfx_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t    *dev    = priv->dev;
 	drm_ctx_t	ctx;
 
-	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
+		return -EFAULT;
 	DRM_DEBUG("%d\n", ctx.handle);
 	drm_ctxbitmap_free(dev, ctx.handle);
 
diff --git a/linux/tdfx_drv.c b/linux/tdfx_drv.c
index 07febea1..2026e9d0 100644
--- a/linux/tdfx_drv.c
+++ b/linux/tdfx_drv.c
@@ -11,11 +11,11 @@
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -23,7 +23,7 @@
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
- * 
+ *
  * Authors:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
  *    Daryll Strauss <daryll@valinux.com>
@@ -36,7 +36,7 @@
 
 #define TDFX_NAME	 "tdfx"
 #define TDFX_DESC	 "3dfx Banshee/Voodoo3+"
-#define TDFX_DATE	 "20000719"
+#define TDFX_DATE	 "20000910"
 #define TDFX_MAJOR	 1
 #define TDFX_MINOR	 0
 #define TDFX_PATCHLEVEL  0
@@ -76,7 +76,7 @@ static drm_ioctl_desc_t	      tdfx_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,	  1, 1 },
-	
+
 	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { tdfx_addctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { tdfx_rmctx,	  1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { tdfx_modctx,	  1, 1 },
@@ -128,7 +128,7 @@ __setup("tdfx=", tdfx_options);
 static int tdfx_setup(drm_device_t *dev)
 {
 	int i;
-	
+
 	atomic_set(&dev->ioctl_count, 0);
 	atomic_set(&dev->vma_count, 0);
 	dev->buf_use	  = 0;
@@ -170,7 +170,7 @@ static int tdfx_setup(drm_device_t *dev)
 
 	dev->ctx_start	    = 0;
 	dev->lck_start	    = 0;
-	
+
 	dev->buf_rp	  = dev->buf;
 	dev->buf_wp	  = dev->buf;
 	dev->buf_end	  = dev->buf + DRM_BSZ;
@@ -179,15 +179,15 @@ static int tdfx_setup(drm_device_t *dev)
 	init_waitqueue_head(&dev->buf_writers);
 
 	tdfx_res_ctx.handle=-1;
-			
+
 	DRM_DEBUG("\n");
-			
+
 	/* The kernel's context could be created here, but is now created
 	   in drm_dma_enqueue.	This is more resource-efficient for
 	   hardware that does not do DMA, but may mean that
 	   drm_select_queue fails between the time the interrupt is
 	   initialized and the time the queues are initialized. */
-			
+
 	return 0;
 }
 
@@ -203,12 +203,12 @@ static int tdfx_takedown(drm_device_t *dev)
 
 	down(&dev->struct_sem);
 	del_timer(&dev->timer);
-	
+
 	if (dev->devname) {
 		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
 		dev->devname = NULL;
 	}
-	
+
 	if (dev->unique) {
 		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
 		dev->unique = NULL;
@@ -227,7 +227,7 @@ static int tdfx_takedown(drm_device_t *dev)
 	if (dev->agp) {
 		drm_agp_mem_t *temp;
 		drm_agp_mem_t *temp_next;
-	   
+
 		temp = dev->agp->memory;
 		while(temp != NULL) {
 			temp_next = temp->next;
@@ -246,7 +246,7 @@ static int tdfx_takedown(drm_device_t *dev)
 		}
 		dev->vmalist = NULL;
 	}
-	
+
 				/* Clear map area and mtrr information */
 	if (dev->maplist) {
 		for (i = 0; i < dev->map_count; i++) {
@@ -284,14 +284,14 @@ static int tdfx_takedown(drm_device_t *dev)
 		dev->maplist   = NULL;
 		dev->map_count = 0;
 	}
-	
+
 	if (dev->lock.hw_lock) {
 		dev->lock.hw_lock    = NULL; /* SHM removed */
 		dev->lock.pid	     = 0;
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
 	up(&dev->struct_sem);
-	
+
 	return 0;
 }
 
@@ -308,7 +308,7 @@ static int tdfx_init(void)
 	memset((void *)dev, 0, sizeof(*dev));
 	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
 	sema_init(&dev->struct_sem, 1);
-	
+
 #ifdef MODULE
 	drm_parse_options(tdfx);
 #endif
@@ -340,7 +340,7 @@ static int tdfx_init(void)
 		 TDFX_PATCHLEVEL,
 		 TDFX_DATE,
 		 tdfx_misc.minor);
-	
+
 	return 0;
 }
 
@@ -351,7 +351,7 @@ static void tdfx_cleanup(void)
 	drm_device_t	      *dev = &tdfx_device;
 
 	DRM_DEBUG("\n");
-	
+
 	drm_proc_cleanup();
 	if (misc_deregister(&tdfx_misc)) {
 		DRM_ERROR("Cannot unload module\n");
@@ -379,17 +379,18 @@ int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
+	if (copy_from_user(&version,
 			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+			   sizeof(version)))
+		return -EFAULT;
 
 #define DRM_COPY(name,value)				     \
 	len = strlen(value);				     \
 	if (len > name##_len) len = name##_len;		     \
 	name##_len = strlen(value);			     \
 	if (len && name) {				     \
-		copy_to_user_ret(name, value, len, -EFAULT); \
+		if (copy_to_user(name, value, len))	     \
+			return -EFAULT;			     \
 	}
 
 	version.version_major	   = TDFX_MAJOR;
@@ -400,10 +401,10 @@ int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, TDFX_DATE);
 	DRM_COPY(version.desc, TDFX_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
+	if (copy_to_user((drm_version_t *)arg,
 			 &version,
-			 sizeof(version),
-			 -EFAULT);
+			 sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -411,7 +412,7 @@ int tdfx_open(struct inode *inode, struct file *filp)
 {
 	drm_device_t  *dev    = &tdfx_device;
 	int	      retcode = 0;
-	
+
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 	if (!(retcode = drm_open_helper(inode, filp, dev))) {
 #if LINUX_VERSION_CODE < 0x020333
@@ -479,7 +480,7 @@ int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->total_ioctl);
 	++priv->ioctl_count;
-	
+
 	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
 		  current->pid, cmd, nr, dev->device, priv->authenticated);
 
@@ -499,7 +500,7 @@ int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			retcode = (func)(inode, filp, cmd, arg);
 		}
 	}
-	
+
 	atomic_dec(&dev->ioctl_count);
 	return retcode;
 }
@@ -518,7 +519,8 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         dev->lck_start = start = get_cycles();
 #endif
 
-        copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+        if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
 
         if (lock.context == DRM_KERNEL_CONTEXT) {
                 DRM_ERROR("Process %d using kernel context %d\n",
@@ -536,7 +538,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
         if (lock.context < 0 || lock.context >= dev->queue_count)
                 return -EINVAL;
 #endif
-        
+
         if (!ret) {
 #if 0
                 if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
@@ -548,7 +550,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 /* Can't take lock if we just had it and
                                    there is contention. */
                                 DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
-					lock.context, current->pid, j, 
+					lock.context, current->pid, j,
 					dev->lock.lock_time, jiffies);
                                 current->state = TASK_INTERRUPTIBLE;
 				current->policy |= SCHED_YIELD;
@@ -571,7 +573,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
                                 atomic_inc(&dev->total_locks);
                                 break;  /* Got lock */
                         }
-                        
+
                                 /* Contention */
                         atomic_inc(&dev->total_sleeps);
                         current->state = TASK_INTERRUPTIBLE;
@@ -615,7 +617,6 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #endif
 
         if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
 		sigemptyset(&dev->sigmask);
 		sigaddset(&dev->sigmask, SIGSTOP);
 		sigaddset(&dev->sigmask, SIGTSTP);
@@ -624,7 +625,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 		dev->sigdata.context = lock.context;
 		dev->sigdata.lock    = dev->lock.hw_lock;
 		block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
                 if (lock.flags & _DRM_LOCK_READY) {
 				/* Wait for space in DMA/FIFO */
 		}
@@ -647,7 +648,7 @@ int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 #if DRM_DMA_HISTOGRAM
         atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
 #endif
-        
+
         return ret;
 }
 
@@ -659,8 +660,9 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	  *dev	  = priv->dev;
 	drm_lock_t	  lock;
 
-	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
-	
+	if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+		return -EFAULT;
+
 	if (lock.context == DRM_KERNEL_CONTEXT) {
 		DRM_ERROR("Process %d using kernel context %d\n",
 			  current->pid, lock.context);
@@ -688,9 +690,7 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 		current->priority = DEF_PRIORITY;
 	}
 #endif
-	
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+
 	unblock_all_signals();
-#endif
 	return 0;
 }
author	Gareth Hughes <gareth@users.sourceforge.net>	2000-09-10 16:16:41 +0000
committer	Gareth Hughes <gareth@users.sourceforge.net>	2000-09-10 16:16:41 +0000
commit	83253109dc9400daece9111d9a832587ce3690ed (patch)
tree	b2e00dc30602554c500ddf53ca603d7eb3f8b252
parent	a5c98c730f6a865f0fb457103bfeb6dad5b82045 (diff)