Sync with Linux 2.4.0-test11-pre5 Provide backward compatibility tested

    against 2.2.18pre21
As usual, since all 2.4.0-test* kernels set LINUX_VERSION_CODE to the same
    value, if you are running a 2.4.0-test kernel, you MUST be running
    2.4.0-test11-pre4 or later (although anything after 2.4.0-test11-pre1
    should work fine -- I tested with pre4/pre5). I expect 2.2.x support to
    continue to work for all recent kernels, but I tested with 2.2.18pre21
    -- we use the old intermodule symbol communication for 2.2.x kernels,
    so they should all continue to work.

16 files changed, 263 insertions, 185 deletions

diff --git a/linux/agpsupport-pre24.h b/linux/agpsupport-pre24.h
new file mode 100644
index 00000000..abcf9f51
--- /dev/null
+++ b/linux/agpsupport-pre24.h
@@ -0,0 +1,115 @@
+/* agpsupport-pre24.h -- Support for pre-2.4.0 kernels -*- linux-c -*-
+ * Created: Mon Nov 13 10:54:15 2000 by faith@valinux.com
+ *
+ * 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.
+ * 
+ * Author: Rickard E. (Rik) Faith <faith@valinux.com>
+ *
+ */
+
+#ifndef _AGPSUPPORT_PRE24_H_
+#define _AGPSUPPORT_PRE24_H_
+typedef struct {
+	void       (*free_memory)(agp_memory *);
+	agp_memory *(*allocate_memory)(size_t, u32);
+	int        (*bind_memory)(agp_memory *, off_t);
+	int        (*unbind_memory)(agp_memory *);
+	void       (*enable)(u32);
+	int        (*acquire)(void);
+	void       (*release)(void);
+	void       (*copy_info)(agp_kern_info *);
+} drm_agp_t;
+
+static drm_agp_t drm_agp_struct = {
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+
+/* The C standard says that 'void *' is not guaranteed to hold a function
+   pointer, so we use this union to define a generic pointer that is
+   guaranteed to hold any of the function pointers we care about. */
+typedef union {
+	void          (*free_memory)(agp_memory *);
+	agp_memory    *(*allocate_memory)(size_t, u32);
+	int           (*bind_memory)(agp_memory *, off_t);
+	int           (*unbind_memory)(agp_memory *);
+	void          (*enable)(u32);
+	int           (*acquire)(void);
+	void          (*release)(void);
+	void          (*copy_info)(agp_kern_info *);
+	unsigned long address;
+} drm_agp_func_u;
+
+typedef struct drm_agp_fill {
+        const char     *name;
+	drm_agp_func_u *f;
+} drm_agp_fill_t;
+
+static drm_agp_fill_t drm_agp_fill[] = {
+	{ __MODULE_STRING(agp_free_memory),
+	   (drm_agp_func_u *)&drm_agp_struct.free_memory     },
+	{ __MODULE_STRING(agp_allocate_memory), 
+	   (drm_agp_func_u *)&drm_agp_struct.allocate_memory },
+	{ __MODULE_STRING(agp_bind_memory),     
+	   (drm_agp_func_u *)&drm_agp_struct.bind_memory     },
+	{ __MODULE_STRING(agp_unbind_memory),   
+	   (drm_agp_func_u *)&drm_agp_struct.unbind_memory   },
+	{ __MODULE_STRING(agp_enable),          
+	   (drm_agp_func_u *)&drm_agp_struct.enable          },
+	{ __MODULE_STRING(agp_backend_acquire), 
+	   (drm_agp_func_u *)&drm_agp_struct.acquire         },
+	{ __MODULE_STRING(agp_backend_release), 
+	   (drm_agp_func_u *)&drm_agp_struct.release         },
+	{ __MODULE_STRING(agp_copy_info),       
+	   (drm_agp_func_u *)&drm_agp_struct.copy_info       },
+	{ NULL, NULL }
+};
+
+#define DRM_AGP_GET _drm_agp_get()
+#define DRM_AGP_PUT _drm_agp_put()
+
+static drm_agp_t *_drm_agp_get(void)
+{
+	drm_agp_fill_t *fill;
+	int            agp_available = 1;
+
+	for (fill = &drm_agp_fill[0]; fill->name; fill++) {
+		char *n  = (char *)fill->name;
+		*fill->f = (drm_agp_func_u)get_module_symbol(NULL, n);
+		DRM_DEBUG("%s resolves to 0x%08lx\n", n, (*fill->f).address);
+		if (!(*fill->f).address) agp_available = 0;
+	}
+	return &drm_agp_struct;
+}
+
+static void _drm_agp_put(void)
+{
+	drm_agp_fill_t *fill;
+	
+	for (fill = &drm_agp_fill[0]; fill->name; fill++) {
+#if LINUX_VERSION_CODE >= 0x020400
+		if ((*fill->f).address) put_module_symbol((*fill->f).address);
+#endif
+		(*fill->f).address = 0;
+	}
+}
+#endif
diff --git a/linux/agpsupport.c b/linux/agpsupport.c
index 24fd59cd..c996df8f 100644
--- a/linux/agpsupport.c
+++ b/linux/agpsupport.c
@@ -31,48 +31,14 @@
 #define __NO_VERSION__
 #include "drmP.h"
 #include <linux/module.h>
+#if LINUX_VERSION_CODE < 0x020400
+#include "agpsupport-pre24.h"
+#else
+#define DRM_AGP_GET (drm_agp_t *)inter_module_get("drm_agp")
+#define DRM_AGP_PUT inter_module_put("drm_agp")
+#endif
 
-drm_agp_func_t drm_agp = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
-
-/* The C standard says that 'void *' is not guaranteed to hold a function
-   pointer, so we use this union to define a generic pointer that is
-   guaranteed to hold any of the function pointers we care about. */
-typedef union {
-	void          (*free_memory)(agp_memory *);
-	agp_memory    *(*allocate_memory)(size_t, u32);
-	int           (*bind_memory)(agp_memory *, off_t);
-	int           (*unbind_memory)(agp_memory *);
-	void          (*enable)(u32);
-	int           (*acquire)(void);
-	void          (*release)(void);
-	void          (*copy_info)(agp_kern_info *);
-	unsigned long address;
-} drm_agp_func_u;
-
-typedef struct drm_agp_fill {
-        const char     *name;
-	drm_agp_func_u *f;
-} drm_agp_fill_t;
-
-static drm_agp_fill_t drm_agp_fill[] = {
-	{ __MODULE_STRING(agp_free_memory),
-	   (drm_agp_func_u *)&drm_agp.free_memory     },
-	{ __MODULE_STRING(agp_allocate_memory), 
-	   (drm_agp_func_u *)&drm_agp.allocate_memory },
-	{ __MODULE_STRING(agp_bind_memory),     
-	   (drm_agp_func_u *)&drm_agp.bind_memory     },
-	{ __MODULE_STRING(agp_unbind_memory),   
-	   (drm_agp_func_u *)&drm_agp.unbind_memory   },
-	{ __MODULE_STRING(agp_enable),          
-	   (drm_agp_func_u *)&drm_agp.enable          },
-	{ __MODULE_STRING(agp_backend_acquire), 
-	   (drm_agp_func_u *)&drm_agp.acquire         },
-	{ __MODULE_STRING(agp_backend_release), 
-	   (drm_agp_func_u *)&drm_agp.release         },
-	{ __MODULE_STRING(agp_copy_info),       
-	   (drm_agp_func_u *)&drm_agp.copy_info       },
-	{ NULL, NULL }
-};
+static const drm_agp_t *drm_agp = NULL;
 
 int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
 		 unsigned long arg)
@@ -82,7 +48,7 @@ int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
 	agp_kern_info    *kern;
 	drm_agp_info_t   info;
 
-	if (!dev->agp->acquired || !drm_agp.copy_info) return -EINVAL;
+	if (!dev->agp->acquired || !drm_agp->copy_info) return -EINVAL;
 
 	kern                   = &dev->agp->agp_info;
 	info.agp_version_major = kern->version.major;
@@ -107,8 +73,8 @@ int drm_agp_acquire(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	 *dev	 = priv->dev;
 	int              retcode;
 
-	if (dev->agp->acquired || !drm_agp.acquire) return -EINVAL;
-	if ((retcode = (*drm_agp.acquire)())) return retcode;
+	if (dev->agp->acquired || !drm_agp->acquire) return -EINVAL;
+	if ((retcode = drm_agp->acquire())) return retcode;
 	dev->agp->acquired = 1;
 	return 0;
 }
@@ -119,13 +85,18 @@ int drm_agp_release(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_file_t	 *priv	 = filp->private_data;
 	drm_device_t	 *dev	 = priv->dev;
 
-	if (!dev->agp->acquired || !drm_agp.release) return -EINVAL;
-	(*drm_agp.release)();
+	if (!dev->agp->acquired || !drm_agp->release) return -EINVAL;
+	drm_agp->release();
 	dev->agp->acquired = 0;
 	return 0;
 	
 }
 
+void _drm_agp_release(void)
+{
+	if (drm_agp->release) drm_agp->release();
+}
+
 int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
 		   unsigned long arg)
 {
@@ -133,13 +104,13 @@ int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_device_t	 *dev	 = priv->dev;
 	drm_agp_mode_t   mode;
 
-	if (!dev->agp->acquired || !drm_agp.enable) return -EINVAL;
+	if (!dev->agp->acquired || !drm_agp->enable) return -EINVAL;
 
 	if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode)))
 		return -EFAULT;
 	
 	dev->agp->mode    = mode.mode;
-	(*drm_agp.enable)(mode.mode);
+	drm_agp->enable(mode.mode);
 	dev->agp->base    = dev->agp->agp_info.aper_base;
 	dev->agp->enabled = 1;
 	return 0;
@@ -231,7 +202,7 @@ int drm_agp_bind(struct inode *inode, struct file *filp, unsigned int cmd,
 	int               retcode;
 	int               page;
 	
-	if (!dev->agp->acquired || !drm_agp.bind_memory) return -EINVAL;
+	if (!dev->agp->acquired || !drm_agp->bind_memory) return -EINVAL;
 	if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
 		return -EFAULT;
 	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
@@ -270,24 +241,14 @@ int drm_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
 
 drm_agp_head_t *drm_agp_init(void)
 {
-	drm_agp_fill_t *fill;
 	drm_agp_head_t *head         = NULL;
-	int            agp_available = 1;
-
-	for (fill = &drm_agp_fill[0]; fill->name; fill++) {
-		char *n  = (char *)fill->name;
-		*fill->f = (drm_agp_func_u)get_module_symbol(NULL, n);
-		DRM_DEBUG("%s resolves to 0x%08lx\n", n, (*fill->f).address);
-		if (!(*fill->f).address) agp_available = 0;
-	}
-   
-	DRM_DEBUG("agp_available = %d\n", agp_available);
 
-	if (agp_available) {
+	drm_agp = DRM_AGP_GET;
+	if (drm_agp) {
 		if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
 			return NULL;
 		memset((void *)head, 0, sizeof(*head));
-		(*drm_agp.copy_info)(&head->agp_info);
+		drm_agp->copy_info(&head->agp_info);
 		if (head->agp_info.chipset == NOT_SUPPORTED) {
 			drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
 			return NULL;
@@ -337,12 +298,31 @@ drm_agp_head_t *drm_agp_init(void)
 
 void drm_agp_uninit(void)
 {
-	drm_agp_fill_t *fill;
-	
-	for (fill = &drm_agp_fill[0]; fill->name; fill++) {
-#if LINUX_VERSION_CODE >= 0x020400
-		if ((*fill->f).address) put_module_symbol((*fill->f).address);
-#endif
-		(*fill->f).address = 0;
-	}
+	DRM_AGP_PUT;
+	drm_agp = NULL;
+}
+
+agp_memory *drm_agp_allocate_memory(size_t pages, u32 type)
+{
+	if (!drm_agp->allocate_memory) return NULL;
+	return drm_agp->allocate_memory(pages, type);
+}
+
+int drm_agp_free_memory(agp_memory *handle)
+{
+	if (!handle || !drm_agp->free_memory) return 0;
+	drm_agp->free_memory(handle);
+	return 1;
+}
+
+int drm_agp_bind_memory(agp_memory *handle, off_t start)
+{
+	if (!handle || !drm_agp->bind_memory) return -EINVAL;
+	return drm_agp->bind_memory(handle, start);
+}
+
+int drm_agp_unbind_memory(agp_memory *handle)
+{
+	if (!handle || !drm_agp->unbind_memory) return -EINVAL;
+	return drm_agp->unbind_memory(handle);
 }
diff --git a/linux/compat-pre24.h b/linux/compat-pre24.h
index 257baca1..77a2bee1 100644
--- a/linux/compat-pre24.h
+++ b/linux/compat-pre24.h
@@ -38,4 +38,8 @@
 #define block_all_signals(a,b,c)
 #define unblock_all_signals()
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
+#define __exit
+#endif
+
 #endif
diff --git a/linux/drmP.h b/linux/drmP.h
index 46e08e05..affeae70 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -59,15 +59,6 @@
 #include <asm/io.h>
 #include <asm/mman.h>
 #include <asm/uaccess.h>
-
-#ifndef copy_to_user_ret
-#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n)) return retval; })
-#endif
-
-#ifndef copy_from_user_ret
-#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n)) return retval; })
-#endif
-
 #ifdef CONFIG_MTRR
 #include <asm/mtrr.h>
 #endif
@@ -519,19 +510,6 @@ typedef struct drm_agp_head {
 	unsigned long      base;
    	int 		   agp_mtrr;
 } drm_agp_head_t;
-
-typedef struct {
-	void       (*free_memory)(agp_memory *);
-	agp_memory *(*allocate_memory)(size_t, u32);
-	int        (*bind_memory)(agp_memory *, off_t);
-	int        (*unbind_memory)(agp_memory *);
-	void       (*enable)(u32);
-	int        (*acquire)(void);
-	void       (*release)(void);
-	void       (*copy_info)(agp_kern_info *);
-} drm_agp_func_t;
-
-extern drm_agp_func_t drm_agp;
 #endif
 
 typedef struct drm_sigdata {
@@ -833,6 +811,7 @@ extern drm_agp_head_t *drm_agp_init(void);
 extern void           drm_agp_uninit(void);
 extern int            drm_agp_acquire(struct inode *inode, struct file *filp,
 				      unsigned int cmd, unsigned long arg);
+extern void           _drm_agp_release(void);
 extern int            drm_agp_release(struct inode *inode, struct file *filp,
 				      unsigned int cmd, unsigned long arg);
 extern int            drm_agp_enable(struct inode *inode, struct file *filp,
@@ -847,6 +826,10 @@ extern int            drm_agp_unbind(struct inode *inode, struct file *filp,
 				     unsigned int cmd, unsigned long arg);
 extern int            drm_agp_bind(struct inode *inode, struct file *filp,
 				   unsigned int cmd, unsigned long arg);
+extern agp_memory     *drm_agp_allocate_memory(size_t pages, u32 type);
+extern int            drm_agp_free_memory(agp_memory *handle);
+extern int            drm_agp_bind_memory(agp_memory *handle, off_t start);
+extern int            drm_agp_unbind_memory(agp_memory *handle);
 #endif
 #endif
 #endif
diff --git a/linux/gamma_drv.c b/linux/gamma_drv.c
index dba974c2..a17bc1a9 100644
--- a/linux/gamma_drv.c
+++ b/linux/gamma_drv.c
@@ -339,7 +339,7 @@ int gamma_find_devices(void)
 /* gamma_init is called via init_module at module load time, or via
  * linux/init/main.c (this is not currently supported). */
 
-static int gamma_init(void)
+static int __init gamma_init(void)
 {
 	int		      retcode;
 	drm_device_t	      *dev = &gamma_device;
@@ -380,7 +380,7 @@ static int gamma_init(void)
 
 /* gamma_cleanup is called via cleanup_module at module unload time. */
 
-static void gamma_cleanup(void)
+static void __exit gamma_cleanup(void)
 {
 	drm_device_t	      *dev = &gamma_device;
 
diff --git a/linux/i810_drv.c b/linux/i810_drv.c
index ed880c41..7152eac3 100644
--- a/linux/i810_drv.c
+++ b/linux/i810_drv.c
@@ -255,8 +255,7 @@ static int i810_takedown(drm_device_t *dev)
 		}
 		dev->agp->memory = NULL;
 
-		if (dev->agp->acquired && drm_agp.release)
-			(*drm_agp.release)();
+		if (dev->agp->acquired) _drm_agp_release();
 
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
@@ -338,7 +337,7 @@ static int i810_takedown(drm_device_t *dev)
 /* i810_init is called via init_module at module load time, or via
  * linux/init/main.c (this is not currently supported). */
 
-static int i810_init(void)
+static int __init i810_init(void)
 {
 	int		      retcode;
 	drm_device_t	      *dev = &i810_device;
@@ -397,7 +396,7 @@ static int i810_init(void)
 
 /* i810_cleanup is called via cleanup_module at module unload time. */
 
-static void i810_cleanup(void)
+static void __exit i810_cleanup(void)
 {
 	drm_device_t	      *dev = &i810_device;
 
diff --git a/linux/memory.c b/linux/memory.c
index 34d19b20..261fb34a 100644
--- a/linux/memory.c
+++ b/linux/memory.c
@@ -352,16 +352,13 @@ agp_memory *drm_alloc_agp(int pages, u32 type)
 		return NULL;
 	}
 	
-	if (drm_agp.allocate_memory) {
-		if ((handle = (*drm_agp.allocate_memory)(pages,
-							 type))) {
-			spin_lock(&drm_mem_lock);
-			++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
-			drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
-				+= pages << PAGE_SHIFT;
-			spin_unlock(&drm_mem_lock);
-			return handle;
-		}
+	if ((handle = drm_agp_allocate_memory(pages, type))) {
+		spin_lock(&drm_mem_lock);
+		++drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
+		drm_mem_stats[DRM_MEM_TOTALAGP].bytes_allocated
+			+= pages << PAGE_SHIFT;
+		spin_unlock(&drm_mem_lock);
+		return handle;
 	}
 	spin_lock(&drm_mem_lock);
 	++drm_mem_stats[DRM_MEM_TOTALAGP].fail_count;
@@ -381,8 +378,7 @@ int drm_free_agp(agp_memory *handle, int pages)
 		return retval;;
 	}
 	
-	if (drm_agp.free_memory) {
-		(*drm_agp.free_memory)(handle);
+	if (drm_agp_free_memory(handle)) {
 		spin_lock(&drm_mem_lock);
 		free_count  = ++drm_mem_stats[DRM_MEM_TOTALAGP].free_count;
 		alloc_count =   drm_mem_stats[DRM_MEM_TOTALAGP].succeed_count;
@@ -403,24 +399,19 @@ int drm_bind_agp(agp_memory *handle, unsigned int start)
 {
 	int retcode = -EINVAL;
 
-   DRM_DEBUG("drm_bind_agp called\n");
 	if (!handle) {
 		DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
 			      "Attempt to bind NULL AGP handle\n");
 		return retcode;
 	}
 
-   DRM_DEBUG("drm_agp.bind_memory : %p\n", drm_agp.bind_memory);
-	if (drm_agp.bind_memory) {
-		if (!(retcode = (*drm_agp.bind_memory)(handle, start))) {
-			spin_lock(&drm_mem_lock);
-			++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
-			drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
-				+= handle->page_count << PAGE_SHIFT;
-			spin_unlock(&drm_mem_lock);
-		   DRM_DEBUG("drm_agp.bind_memory: retcode %d\n", retcode);
-			return retcode;
-		}
+	if (!(retcode = drm_agp_bind_memory(handle, start))) {
+		spin_lock(&drm_mem_lock);
+		++drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
+		drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_allocated
+			+= handle->page_count << PAGE_SHIFT;
+		spin_unlock(&drm_mem_lock);
+		return retcode;
 	}
 	spin_lock(&drm_mem_lock);
 	++drm_mem_stats[DRM_MEM_BOUNDAGP].fail_count;
@@ -440,20 +431,17 @@ int drm_unbind_agp(agp_memory *handle)
 		return retcode;
 	}
 
-	if (drm_agp.unbind_memory) {
-		int c = handle->page_count;
-		if ((retcode = (*drm_agp.unbind_memory)(handle)))
-			return retcode;
-		spin_lock(&drm_mem_lock);
-		free_count  = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
-		alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
-		drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed += c << PAGE_SHIFT;
-		spin_unlock(&drm_mem_lock);
-		if (free_count > alloc_count) {
-			DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
-				      "Excess frees: %d frees, %d allocs\n",
-				      free_count, alloc_count);
-		}
+	if ((retcode = drm_agp_unbind_memory(handle))) return retcode;
+	spin_lock(&drm_mem_lock);
+	free_count  = ++drm_mem_stats[DRM_MEM_BOUNDAGP].free_count;
+	alloc_count = drm_mem_stats[DRM_MEM_BOUNDAGP].succeed_count;
+	drm_mem_stats[DRM_MEM_BOUNDAGP].bytes_freed
+		+= handle->page_count << PAGE_SHIFT;
+	spin_unlock(&drm_mem_lock);
+	if (free_count > alloc_count) {
+		DRM_MEM_ERROR(DRM_MEM_BOUNDAGP,
+			      "Excess frees: %d frees, %d allocs\n",
+			      free_count, alloc_count);
 	}
 	return retcode;
 }
diff --git a/linux/mga_bufs.c b/linux/mga_bufs.c
index 00c0ea7f..05d941b4 100644
--- a/linux/mga_bufs.c
+++ b/linux/mga_bufs.c
@@ -420,7 +420,6 @@ int mga_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
 						 sizeof(dma->bufs[0]
 							.freelist.high_mark)))
 					return -EFAULT;
-
 				++count;
 			}
 		}
diff --git a/linux/mga_drv.c b/linux/mga_drv.c
index 4aaac625..883eb75c 100644
--- a/linux/mga_drv.c
+++ b/linux/mga_drv.c
@@ -255,8 +255,7 @@ static int mga_takedown(drm_device_t *dev)
 		}
 		dev->agp->memory = NULL;
 
-		if (dev->agp->acquired && drm_agp.release)
-			(*drm_agp.release)();
+		if (dev->agp->acquired)	_drm_agp_release();
 
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
@@ -338,7 +337,7 @@ static int mga_takedown(drm_device_t *dev)
 /* mga_init is called via init_module at module load time, or via
  * linux/init/main.c (this is not currently supported). */
 
-static int mga_init(void)
+static int __init mga_init(void)
 {
 	int		      retcode;
 	drm_device_t	      *dev = &mga_device;
@@ -398,7 +397,7 @@ static int mga_init(void)
 
 /* mga_cleanup is called via cleanup_module at module unload time. */
 
-static void mga_cleanup(void)
+static void __exit mga_cleanup(void)
 {
 	drm_device_t	      *dev = &mga_device;
 
diff --git a/linux/r128_drm.h b/linux/r128_drm.h
index 8a0cd196..8a4842cf 100644
--- a/linux/r128_drm.h
+++ b/linux/r128_drm.h
@@ -57,9 +57,9 @@ typedef struct drm_r128_init {
 } drm_r128_init_t;
 
 typedef struct drm_r128_packet {
-	void *buffer;
-	int  count;
-	int  flags;
+	unsigned int *buffer;
+	int          count;
+	int          flags;
 } drm_r128_packet_t;
 
 typedef enum drm_r128_prim {
diff --git a/linux/r128_drv.c b/linux/r128_drv.c
index 7ae49801..969ada93 100644
--- a/linux/r128_drv.c
+++ b/linux/r128_drv.c
@@ -252,8 +252,7 @@ static int r128_takedown(drm_device_t *dev)
 		}
 		dev->agp->memory = NULL;
 
-		if (dev->agp->acquired && drm_agp.release)
-			(*drm_agp.release)();
+		if (dev->agp->acquired)	_drm_agp_release();
 
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;
@@ -323,7 +322,7 @@ static int r128_takedown(drm_device_t *dev)
 /* r128_init is called via init_module at module load time, or via
  * linux/init/main.c (this is not currently supported). */
 
-static int r128_init(void)
+static int __init r128_init(void)
 {
 	int		      retcode;
 	drm_device_t	      *dev = &r128_device;
@@ -387,7 +386,7 @@ static int r128_init(void)
 
 /* r128_cleanup is called via cleanup_module at module unload time. */
 
-static void r128_cleanup(void)
+static void __exit r128_cleanup(void)
 {
 	drm_device_t	      *dev = &r128_device;
 
diff --git a/linux/r128_drv.h b/linux/r128_drv.h
index da2f676d..63b98c72 100644
--- a/linux/r128_drv.h
+++ b/linux/r128_drv.h
@@ -197,7 +197,7 @@ extern int  r128_context_switch_complete(drm_device_t *dev, int new);
 #define R128_MAX_USEC_TIMEOUT	100000	/* 100 ms */
 
 
-#define R128_BASE(reg)		((unsigned long)(dev_priv->mmio->handle))
+#define R128_BASE(reg)		((u32)(dev_priv->mmio->handle))
 #define R128_ADDR(reg)		(R128_BASE(reg) + reg)
 
 #define R128_DEREF(reg)		*(__volatile__ int *)R128_ADDR(reg)
diff --git a/linux/sis_context.c b/linux/sis_context.c
index f2fdf6dd..accd789a 100644
--- a/linux/sis_context.c
+++ b/linux/sis_context.c
@@ -106,19 +106,19 @@ int sis_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],
-					 &i,
-					 sizeof(i),
-					 -EFAULT);
+			if (copy_to_user(&res.contexts[i], &i, 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;
 }
 
@@ -130,7 +130,8 @@ int sis_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 = sis_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
 				/* Skip kernel's context and get a new one. */
 		ctx.handle = sis_alloc_queue(dev);
@@ -145,7 +146,8 @@ int sis_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
 	/* new added */
 	sis_init_context(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;
 }
 
@@ -154,7 +156,8 @@ int sis_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)
 		sis_res_ctx.handle=ctx.handle;
 	return 0;
@@ -165,10 +168,12 @@ int sis_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;
 }
 
@@ -179,7 +184,8 @@ int sis_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 sis_context_switch(dev, dev->last_context, ctx.handle);
 }
@@ -191,7 +197,8 @@ int sis_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);
 	sis_context_switch_complete(dev, ctx.handle);
 
@@ -205,7 +212,8 @@ int sis_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/sis_drv.c b/linux/sis_drv.c
index 2f98e322..92ec32dd 100644
--- a/linux/sis_drv.c
+++ b/linux/sis_drv.c
@@ -250,7 +250,7 @@ static int sis_takedown(drm_device_t *dev)
 			drm_free(temp, sizeof(*temp), DRM_MEM_AGPLISTS);
 			temp = temp_next;
 		}
-		if (dev->agp->acquired) (*drm_agp.release)();
+		if (dev->agp->acquired) _drm_agp_release();
 	}
 #endif
 				/* Clear vma list (only built for debugging) */
@@ -394,17 +394,16 @@ int sis_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_version_t version;
 	int	      len;
 
-	copy_from_user_ret(&version,
-			   (drm_version_t *)arg,
-			   sizeof(version),
-			   -EFAULT);
+	if (copy_from_user(&version, (drm_version_t *)arg, 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	   = SIS_MAJOR;
@@ -415,10 +414,8 @@ int sis_version(struct inode *inode, struct file *filp, unsigned int cmd,
 	DRM_COPY(version.date, SIS_DATE);
 	DRM_COPY(version.desc, SIS_DESC);
 
-	copy_to_user_ret((drm_version_t *)arg,
-			 &version,
-			 sizeof(version),
-			 -EFAULT);
+	if (copy_to_user((drm_version_t *)arg, &version, sizeof(version)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -533,7 +530,8 @@ int sis_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",
@@ -667,7 +665,8 @@ int sis_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",
diff --git a/linux/sis_mm.c b/linux/sis_mm.c
index 9a8f83ea..4c2b5a6c 100644
--- a/linux/sis_mm.c
+++ b/linux/sis_mm.c
@@ -78,7 +78,8 @@ int sis_fb_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
   struct sis_memreq req;
   int retval = 0;
    
-  copy_from_user_ret(&fb, (drm_sis_mem_t *)arg, sizeof(fb), -EFAULT);
+  if (copy_from_user(&fb, (drm_sis_mem_t *)arg, sizeof(fb)))
+	  return -EFAULT;
   
   req.size = fb.size;
   sis_malloc(&req);
@@ -98,7 +99,7 @@ int sis_fb_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
     fb.free = 0;
   }
    
-  copy_to_user_ret((drm_sis_mem_t *)arg, &fb, sizeof(fb), -EFAULT);
+  if (copy_to_user((drm_sis_mem_t *)arg, &fb, sizeof(fb))) return -EFAULT;
 
   DRM_DEBUG("alloc fb, size = %d, offset = %ld\n", fb.size, req.offset);
 
@@ -111,7 +112,8 @@ int sis_fb_free(struct inode *inode, struct file *filp, unsigned int cmd,
   drm_sis_mem_t fb;
   int retval = 0;
     
-  copy_from_user_ret(&fb, (drm_sis_mem_t *)arg, sizeof(fb), -EFAULT);
+  if (copy_from_user(&fb, (drm_sis_mem_t *)arg, sizeof(fb)))
+	  return -EFAULT;
   
   if(!fb.free){
     return -1;
@@ -152,7 +154,8 @@ int sis_agp_init(struct inode *inode, struct file *filp, unsigned int cmd,
 {
   drm_sis_agp_t agp;
    
-  copy_from_user_ret(&agp, (drm_sis_agp_t *)arg, sizeof(agp), -EFAULT);
+  if (copy_from_user(&agp, (drm_sis_agp_t *)arg, sizeof(agp)))
+	  return -EFAULT;
 
   AgpHeap = mmInit(agp.offset, agp.size);
 
@@ -171,7 +174,8 @@ int sis_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
   if(!AgpHeap)
     return -1;
   
-  copy_from_user_ret(&agp, (drm_sis_mem_t *)arg, sizeof(agp), -EFAULT);
+  if (copy_from_user(&agp, (drm_sis_mem_t *)arg, sizeof(agp)))
+	  return -EFAULT;
   
   block = mmAllocMem(AgpHeap, agp.size, 0, 0);
   if(block){
@@ -190,7 +194,7 @@ int sis_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
     agp.free = 0;
   }
    
-  copy_to_user_ret((drm_sis_mem_t *)arg, &agp, sizeof(agp), -EFAULT);
+  if (copy_to_user((drm_sis_mem_t *)arg, &agp, sizeof(agp))) return -EFAULT;
 
   DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size, agp.offset);
 
@@ -206,7 +210,8 @@ int sis_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
   if(!AgpHeap)
     return -1;
     
-  copy_from_user_ret(&agp, (drm_sis_mem_t *)arg, sizeof(agp), -EFAULT);
+  if (copy_from_user(&agp, (drm_sis_mem_t *)arg, sizeof(agp)))
+	  return -EFAULT;
   
   if(!agp.free){
     return -1;
diff --git a/linux/tdfx_drv.c b/linux/tdfx_drv.c
index 5f2c804a..7d79a013 100644
--- a/linux/tdfx_drv.c
+++ b/linux/tdfx_drv.c
@@ -235,7 +235,7 @@ static int tdfx_takedown(drm_device_t *dev)
 			drm_free(temp, sizeof(*temp), DRM_MEM_AGPLISTS);
 			temp = temp_next;
 		}
-		if (dev->agp->acquired) (*drm_agp.release)();
+		if (dev->agp->acquired) _drm_agp_release();
 	}
 #endif
 				/* Clear vma list (only built for debugging) */
@@ -298,7 +298,7 @@ static int tdfx_takedown(drm_device_t *dev)
 /* tdfx_init is called via init_module at module load time, or via
  * linux/init/main.c (this is not currently supported). */
 
-static int tdfx_init(void)
+static int __init tdfx_init(void)
 {
 	int		      retcode;
 	drm_device_t	      *dev = &tdfx_device;
@@ -346,7 +346,7 @@ static int tdfx_init(void)
 
 /* tdfx_cleanup is called via cleanup_module at module unload time. */
 
-static void tdfx_cleanup(void)
+static void __exit tdfx_cleanup(void)
 {
 	drm_device_t	      *dev = &tdfx_device;