Get latest kernel module updates from Rik Faith. Thanks, Rik! Sync with

    2.4.0-test7, other fixes currently on the trunk.

27 files changed, 310 insertions, 99 deletions

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 0fa20571..b9a4dab4 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -57,7 +57,7 @@
 #include <linux/types.h>
 #include <linux/agp_backend.h>
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+#if LINUX_VERSION_CODE >= 0x020100 /* KERNEL_VERSION(2,1,0) */
 #include <linux/tqueue.h>
 #include <linux/poll.h>
 #endif
@@ -328,6 +328,7 @@ typedef struct drm_freelist {
 	int		  low_mark;    /* Low water mark		   */
 	int		  high_mark;   /* High water mark		   */
 	atomic_t	  wfh;	       /* If waiting for high mark	   */
+	spinlock_t        lock;
 } drm_freelist_t;
 
 typedef struct drm_buf_entry {
@@ -450,6 +451,11 @@ typedef struct {
 extern drm_agp_func_t drm_agp;
 #endif
 
+typedef struct drm_sigdata {
+	int           context;
+	drm_hw_lock_t *lock;
+} drm_sigdata_t;
+
 typedef struct drm_device {
 	const char	  *name;	/* Simple driver name		   */
 	char		  *unique;	/* Unique identifier: e.g., busid  */
@@ -534,6 +540,8 @@ typedef struct drm_device {
 #endif
 	unsigned long     *ctx_bitmap;
 	void		  *dev_private;
+	drm_sigdata_t     sigdata; /* For block_all_signals */
+	sigset_t          sigmask;
 } drm_device_t;
 
 
@@ -728,6 +736,7 @@ extern int	     drm_flush_unblock(drm_device_t *dev, int context,
 				       drm_lock_flags_t flags);
 extern int	     drm_flush_block_and_flush(drm_device_t *dev, int context,
 					       drm_lock_flags_t flags);
+extern int           drm_notifier(void *priv);
 
 				/* Context Bitmap support (ctxbitmap.c) */
 extern int	     drm_ctxbitmap_init(drm_device_t *dev);
diff --git a/linux-core/i810_dma.c b/linux-core/i810_dma.c
index 19b7bd92..5792bf39 100644
--- a/linux-core/i810_dma.c
+++ b/linux-core/i810_dma.c
@@ -1227,6 +1227,16 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	
 	if (!ret) {
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+		sigemptyset(&dev->sigmask);
+		sigaddset(&dev->sigmask, SIGSTOP);
+		sigaddset(&dev->sigmask, SIGTSTP);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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");
diff --git a/linux-core/i810_drv.c b/linux-core/i810_drv.c
index 275663a1..18168605 100644
--- a/linux-core/i810_drv.c
+++ b/linux-core/i810_drv.c
@@ -642,5 +642,8 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 						       - 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 acc42b83..a4a8fe55 100644
--- a/linux-core/mga_drv.c
+++ b/linux-core/mga_drv.c
@@ -655,5 +655,8 @@ 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 fac88247..dd982ab4 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	 "20000719"
+#define R128_DATE	 "20000827"
 #define R128_MAJOR	 1
 #define R128_MINOR	 0
 #define R128_PATCHLEVEL  0
@@ -466,7 +466,7 @@ int r128_open(struct inode *inode, struct file *filp)
 		}
 		spin_unlock(&dev->count_lock);
 	}
-	
+
 	return retcode;
 }
 
@@ -500,7 +500,7 @@ int r128_release(struct inode *inode, struct file *filp)
 		}
 		spin_unlock(&dev->count_lock);
 	}
-	
+
 	unlock_kernel();
 	return retcode;
 }
@@ -656,6 +656,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -720,5 +730,8 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 #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 c04561ee..434a1ccd 100644
--- a/linux-core/sis_drv.c
+++ b/linux-core/sis_drv.c
@@ -1,5 +1,4 @@
 /* sis.c -- sis driver -*- linux-c -*-
- * Created: Thu Oct  7 10:38:32 1999 by faith@precisioninsight.com
  *
  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -23,15 +22,11 @@
  * 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@precisioninsight.com>
- *    Daryll Strauss <daryll@precisioninsight.com>
- *
  */
 
 #include <linux/config.h>
 #include "drmP.h"
-#include "sis_drm_public.h"
+#include "sis_drm.h"
 #include "sis_drv.h"
 
 #define SIS_NAME	 "sis"
@@ -631,6 +626,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -681,7 +686,10 @@ int sis_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/tdfx_drv.c b/linux-core/tdfx_drv.c
index 59f10197..07febea1 100644
--- a/linux-core/tdfx_drv.c
+++ b/linux-core/tdfx_drv.c
@@ -615,6 +615,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -679,5 +689,8 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 #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 fd136e97..7dfb20b1 100644
--- a/linux/Makefile.linux
+++ b/linux/Makefile.linux
@@ -48,7 +48,7 @@
 
 # **** End of SMP/MODVERSIONS detection
 
-MODS=           gamma.o tdfx.o r128.o sis.o
+MODS=           gamma.o tdfx.o r128.o
 LIBS=           libdrm.a
 PROGS=		drmstat
 
@@ -65,9 +65,6 @@ TDFXHEADERS=    tdfx_drv.h $(DRMHEADERS)
 R128OBJS=	r128_drv.o r128_dma.o r128_bufs.o r128_context.o
 R128HEADERS=	r128_drv.h r128_drm.h $(DRMHEADERS)
 
-SISOBJS=	sis_drv.o sis_context.o sis_ds.o sis_mm.o
-SISHEADERS=	sis_drv.h sis_ds.h sis_drm_public.h $(DRMHEADERS)
-
 PROGOBJS=       drmstat.po xf86drm.po xf86drmHash.po xf86drmRandom.po sigio.po
 PROGHEADERS=    xf86drm.h $(DRMHEADERS)
 
@@ -125,8 +122,10 @@ MODVERSIONS := $(shell gcc -E -I $(TREE) picker.c 2>/dev/null \
 	| grep -s 'MODVERSIONS = ' | cut -d' ' -f3)
 AGP := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
 	| grep -s 'AGP = ' | cut -d' ' -f3)
+SIS := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
+	| grep -s 'SIS = ' | cut -d' ' -f3)
 PARAMS := $(shell if fgrep kill_fasync $(TREE)/linux/fs.h \
-	| fgrep -q band; then echo 3; else echo 2; fi)
+	| egrep -q '(band|int, int)'; then echo 3; else echo 2; fi)
 ifeq ($(AGP),0)
 AGP := $(shell gcc -E -nostdinc -I$(TREE) picker.c 2>/dev/null \
 	| grep -s 'AGP_MODULE = ' | cut -d' ' -f3)
@@ -144,8 +143,21 @@ I810OBJS=	i810_drv.o i810_dma.o i810_bufs.o i810_context.o
 I810HEADERS=	i810_drv.h $(DRMHEADERS)
 endif
 
+ifeq ($(SIS),1)
+# It appears that the SiS driver makes calls to sis_malloc and sis_free, and
+# that these calls are only defined if CONFIG_FB_SIS is selected.  So, key
+# off that to determine if we should attempt to build the SiS driver.
+#
+# A better way would be to detect the appropriate definitions in the header
+# file to see if we can, at least, compile the driver.
+MODS += sis.o
+
+SISOBJS=	sis_drv.o sis_context.o sis_ds.o sis_mm.o
+SISHEADERS=	sis_drv.h sis_ds.h sis_drm.h $(DRMHEADERS)
+endif
+
 all::;@echo === KERNEL HEADERS IN $(TREE)
-all::;@echo === SMP=${SMP} MODVERSIONS=${MODVERSIONS} AGP=${AGP}
+all::;@echo === SMP=${SMP} MODVERSIONS=${MODVERSIONS} AGP=${AGP} SIS=${SIS}
 all::;@echo === kill_fasync has $(PARAMS) parameters
 all:: $(LIBS) $(MODS) $(PROGS)
 endif
diff --git a/linux/drmP.h b/linux/drmP.h
index 0fa20571..b9a4dab4 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -57,7 +57,7 @@
 #include <linux/types.h>
 #include <linux/agp_backend.h>
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+#if LINUX_VERSION_CODE >= 0x020100 /* KERNEL_VERSION(2,1,0) */
 #include <linux/tqueue.h>
 #include <linux/poll.h>
 #endif
@@ -328,6 +328,7 @@ typedef struct drm_freelist {
 	int		  low_mark;    /* Low water mark		   */
 	int		  high_mark;   /* High water mark		   */
 	atomic_t	  wfh;	       /* If waiting for high mark	   */
+	spinlock_t        lock;
 } drm_freelist_t;
 
 typedef struct drm_buf_entry {
@@ -450,6 +451,11 @@ typedef struct {
 extern drm_agp_func_t drm_agp;
 #endif
 
+typedef struct drm_sigdata {
+	int           context;
+	drm_hw_lock_t *lock;
+} drm_sigdata_t;
+
 typedef struct drm_device {
 	const char	  *name;	/* Simple driver name		   */
 	char		  *unique;	/* Unique identifier: e.g., busid  */
@@ -534,6 +540,8 @@ typedef struct drm_device {
 #endif
 	unsigned long     *ctx_bitmap;
 	void		  *dev_private;
+	drm_sigdata_t     sigdata; /* For block_all_signals */
+	sigset_t          sigmask;
 } drm_device_t;
 
 
@@ -728,6 +736,7 @@ extern int	     drm_flush_unblock(drm_device_t *dev, int context,
 				       drm_lock_flags_t flags);
 extern int	     drm_flush_block_and_flush(drm_device_t *dev, int context,
 					       drm_lock_flags_t flags);
+extern int           drm_notifier(void *priv);
 
 				/* Context Bitmap support (ctxbitmap.c) */
 extern int	     drm_ctxbitmap_init(drm_device_t *dev);
diff --git a/linux/gamma_dma.c b/linux/gamma_dma.c
index a99f24ca..4a2acfb3 100644
--- a/linux/gamma_dma.c
+++ b/linux/gamma_dma.c
@@ -804,6 +804,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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) {
diff --git a/linux/gamma_drv.c b/linux/gamma_drv.c
index 13d37c24..1fcd1933 100644
--- a/linux/gamma_drv.c
+++ b/linux/gamma_drv.c
@@ -564,5 +564,8 @@ int gamma_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 						       - 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_dma.c b/linux/i810_dma.c
index 19b7bd92..5792bf39 100644
--- a/linux/i810_dma.c
+++ b/linux/i810_dma.c
@@ -1227,6 +1227,16 @@ int i810_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	
 	if (!ret) {
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+		sigemptyset(&dev->sigmask);
+		sigaddset(&dev->sigmask, SIGSTOP);
+		sigaddset(&dev->sigmask, SIGTSTP);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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");
diff --git a/linux/i810_drv.c b/linux/i810_drv.c
index 275663a1..18168605 100644
--- a/linux/i810_drv.c
+++ b/linux/i810_drv.c
@@ -642,5 +642,8 @@ int i810_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 						       - dev->lck_start)]);
 #endif
 	
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+	unblock_all_signals();
+#endif
 	return 0;
 }
diff --git a/linux/lists.c b/linux/lists.c
index f62495aa..5da7cc6c 100644
--- a/linux/lists.c
+++ b/linux/lists.c
@@ -116,6 +116,7 @@ int drm_freelist_create(drm_freelist_t *bl, int count)
 	bl->low_mark  = 0;
 	bl->high_mark = 0;
 	atomic_set(&bl->wfh,   0);
+	bl->lock      = SPIN_LOCK_UNLOCKED;
 	++bl->initialized;
 	return 0;
 }
@@ -130,8 +131,6 @@ int drm_freelist_destroy(drm_freelist_t *bl)
 
 int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
 {
-	drm_buf_t        *old, *prev;
-	int		 count = 0;
 	drm_device_dma_t *dma  = dev->dma;
 
 	if (!dma) {
@@ -152,15 +151,12 @@ int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
 	drm_histogram_compute(dev, buf);
 #endif
 	buf->list	= DRM_LIST_FREE;
-	do {
-		old       = bl->next;
-		buf->next = old;
-		prev      = cmpxchg(&bl->next, old, buf);
-		if (++count > DRM_LOOPING_LIMIT) {
-			DRM_ERROR("Looping\n");
-			return 1;
-		}
-	} while (prev != old);
+	
+	spin_lock(&bl->lock);
+	buf->next	= bl->next;
+	bl->next	= buf;
+	spin_unlock(&bl->lock);
+	
 	atomic_inc(&bl->count);
 	if (atomic_read(&bl->count) > dma->buf_count) {
 		DRM_ERROR("%d of %d buffers free after addition of %d\n",
@@ -177,26 +173,21 @@ int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
 
 static drm_buf_t *drm_freelist_try(drm_freelist_t *bl)
 {
-	drm_buf_t         *old, *new, *prev;
 	drm_buf_t	  *buf;
-	int		  count = 0;
 
 	if (!bl) return NULL;
 	
 				/* Get buffer */
-	do {
-		old = bl->next;
-		if (!old) return NULL;
-		new  = bl->next->next;
-		prev = cmpxchg(&bl->next, old, new);
-		if (++count > DRM_LOOPING_LIMIT) {
-			DRM_ERROR("Looping\n");
-			return NULL;
-		}
-	} while (prev != old);
-	atomic_dec(&bl->count);
+	spin_lock(&bl->lock);
+	if (!bl->next) {
+		spin_unlock(&bl->lock);
+		return NULL;
+	}
+	buf	  = bl->next;
+	bl->next  = bl->next->next;
+	spin_unlock(&bl->lock);
 	
-	buf	  = old;
+	atomic_dec(&bl->count);
 	buf->next = NULL;
 	buf->list = DRM_LIST_NONE;
 	DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
diff --git a/linux/lock.c b/linux/lock.c
index 55082727..33b2cc03 100644
--- a/linux/lock.c
+++ b/linux/lock.c
@@ -223,3 +223,35 @@ int drm_finish(struct inode *inode, struct file *filp, unsigned int cmd,
 	drm_flush_unblock(dev, lock.context, lock.flags);
 	return ret;
 }
+
+/* If we get here, it means that the process has called DRM_IOCTL_LOCK
+   without calling DRM_IOCTL_UNLOCK.
+   
+   If the lock is not held, then let the signal proceed as usual.
+   
+   If the lock is held, then set the contended flag and keep the signal
+   blocked.
+   
+
+   Return 1 if the signal should be delivered normally.
+   Return 0 if the signal should be blocked.  */
+
+int drm_notifier(void *priv)
+{
+	drm_sigdata_t *s = (drm_sigdata_t *)priv;
+	unsigned int  old, new, prev;
+
+
+				/* Allow signal delivery if lock isn't held */
+	if (!_DRM_LOCK_IS_HELD(s->lock->lock)
+	    || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1;
+	
+				/* Otherwise, set flag to force call to
+                                   drmUnlock */
+	do {
+		old  = s->lock->lock;
+		new  = old | _DRM_LOCK_CONT;
+		prev = cmpxchg(&s->lock->lock, old, new);
+	} while (prev != old);
+	return 0;
+}
diff --git a/linux/mga_dma.c b/linux/mga_dma.c
index 0df0906e..d315954d 100644
--- a/linux/mga_dma.c
+++ b/linux/mga_dma.c
@@ -82,6 +82,7 @@ static void mga_delay(void)
    	return;
 }
 
+#ifdef __i386__
 void mga_flush_write_combine(void)
 {
    	int xchangeDummy;
@@ -92,6 +93,7 @@ void mga_flush_write_combine(void)
 			 " 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 */
@@ -427,7 +429,9 @@ void mga_fire_primary(drm_device_t *dev, drm_mga_prim_buf_t *prim)
 		}
 	}
 
+#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);
@@ -824,7 +828,9 @@ static int mga_dma_initialize(drm_device_t *dev, drm_mga_init_t *init) {
 		 * 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) | 
@@ -1068,6 +1074,16 @@ int mga_lock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 	
 	if (!ret) {
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+		sigemptyset(&dev->sigmask);
+		sigaddset(&dev->sigmask, SIGSTOP);
+		sigaddset(&dev->sigmask, SIGTSTP);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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);
diff --git a/linux/mga_drv.c b/linux/mga_drv.c
index acc42b83..a4a8fe55 100644
--- a/linux/mga_drv.c
+++ b/linux/mga_drv.c
@@ -655,5 +655,8 @@ 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 fe9e3dbe..f49bd0f6 100644
--- a/linux/mga_drv.h
+++ b/linux/mga_drv.h
@@ -39,8 +39,8 @@
 
 typedef struct {
 	u32 buffer_status;
-   	unsigned int num_dwords;
-   	unsigned int max_dwords;
+   	int num_dwords;
+   	int max_dwords;
    	u32 *current_dma_ptr;
    	u32 *head;
    	u32 phys_head;
@@ -209,19 +209,27 @@ typedef struct {
 #define PRIMLOCALS	u8 tempIndex[4]; u32 *dma_ptr; u32 phys_head; \
 			int outcount, num_dwords
 
-#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)) {				\
- 		mga_advance_primary(dev);				\
- 		mga_dma_schedule(dev, 1);				\
- 	} else if( tmp_buf->max_dwords - tmp_buf->num_dwords < length ||\
- 	    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);				\
-	}								\
+#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)) {				   \
+ 		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) {			   \
+		set_bit(MGA_BUF_FORCE_FIRE, &tmp_buf->buffer_status);	   \
+ 		mga_advance_primary(dev);				   \
+ 		mga_dma_schedule(dev, 1);				   \
+		tmp_buf = dev_priv->prim_bufs[dev_priv->current_prim_idx]; \
+	}								   \
+	if(MGA_VERBOSE)							   \
+		DRM_DEBUG("PRIMGETPTR in %s\n", __FUNCTION__);		   \
+	dma_ptr = tmp_buf->current_dma_ptr;				   \
+	num_dwords = tmp_buf->num_dwords;				   \
+	phys_head = tmp_buf->phys_head;					   \
+	outcount = 0;							   \
 } while(0)
 
 #define PRIMGETPTR(dev_priv) do {					\
diff --git a/linux/mga_state.c b/linux/mga_state.c
index 723ccc53..5a9c7632 100644
--- a/linux/mga_state.c
+++ b/linux/mga_state.c
@@ -34,6 +34,22 @@
 #include "mga_drv.h"
 #include "drm.h"
 
+/* If you change the functions to set state, PLEASE
+ * 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 MAX_STATE_SIZE ((MGAEMITCLIP_SIZE * MGA_NR_SAREA_CLIPRECTS) + \
+			MGAEMITCTX_SIZE + MGAG400EMITTEX0_SIZE + \
+			MGAG400EMITTEX1_SIZE + MGAG400EMITPIPE_SIZE)
+
 static void mgaEmitClipRect(drm_mga_private_t * dev_priv,
 			    drm_clip_rect_t * box)
 {
@@ -60,8 +76,8 @@ static void mgaEmitClipRect(drm_mga_private_t * dev_priv,
 
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 	PRIMOUTREG(MGAREG_CXBNDRY, ((box->x2) << 16) | (box->x1));
-	PRIMOUTREG(MGAREG_YTOP, box->y1 * dev_priv->stride / 2);
-	PRIMOUTREG(MGAREG_YBOT, box->y2 * dev_priv->stride / 2);
+	PRIMOUTREG(MGAREG_YTOP, box->y1 * dev_priv->stride / dev_priv->cpp);
+	PRIMOUTREG(MGAREG_YBOT, box->y2 * dev_priv->stride / dev_priv->cpp);
 
 	PRIMADVANCE(dev_priv);
 }
@@ -224,7 +240,6 @@ static void mgaG400EmitTex1(drm_mga_private_t * dev_priv)
 	PRIMADVANCE(dev_priv);
 }
 
-#define EMIT_PIPE 50
 static void mgaG400EmitPipe(drm_mga_private_t * dev_priv)
 {
 	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
@@ -492,7 +507,6 @@ static void mga_dma_dispatch_tex_blit(drm_device_t * dev,
 	y2 = length / 64;
 
 	PRIM_OVERFLOW(dev, dev_priv, 30);
-	PRIMGETPTR(dev_priv);
 
 	PRIMOUTREG(MGAREG_DSTORG, destOrg);
 	PRIMOUTREG(MGAREG_MACCESS, 0x00000000);
@@ -526,7 +540,6 @@ static void mga_dma_dispatch_vertex(drm_device_t * dev, drm_buf_t * buf)
 	int length = buf->used;
 	int use_agp = PDEA_pagpxfer_enable;
 	int i = 0;
-	int primary_needed;
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -542,9 +555,8 @@ static void mga_dma_dispatch_vertex(drm_device_t * dev, drm_buf_t * buf)
 		 * these numbers (Overestimating this doesn't hurt).  
 		 */
 		buf_priv->dispatched = 1;
-		primary_needed = (50 + 15 + 15 + 30 + 25 +
-				  10 + 15 * MGA_NR_SAREA_CLIPRECTS);
-		PRIM_OVERFLOW(dev, dev_priv, primary_needed);
+		PRIM_OVERFLOW(dev, dev_priv,
+			      (MAX_STATE_SIZE + (5 * MGA_NR_SAREA_CLIPRECTS)));
 		mgaEmitState(dev_priv);
 		do {
 			if (i < sarea_priv->nbox) {
@@ -592,7 +604,6 @@ static void mga_dma_dispatch_indices(drm_device_t * dev,
 	unsigned int address = (unsigned int) buf->bus_address;
 	int use_agp = PDEA_pagpxfer_enable;
 	int i = 0;
-	int primary_needed;
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -606,9 +617,8 @@ static void mga_dma_dispatch_indices(drm_device_t * dev,
 		 * these numbers (Overestimating this doesn't hurt).  
 		 */
 		buf_priv->dispatched = 1;
-		primary_needed = (50 + 15 + 15 + 30 + 25 +
-				  10 + 15 * MGA_NR_SAREA_CLIPRECTS);
-		PRIM_OVERFLOW(dev, dev_priv, primary_needed);
+		PRIM_OVERFLOW(dev, dev_priv,
+			      (MAX_STATE_SIZE + (5 * MGA_NR_SAREA_CLIPRECTS)));
 		mgaEmitState(dev_priv);
 
 		do {
@@ -657,7 +667,6 @@ static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 	drm_clip_rect_t *pbox = sarea_priv->boxes;
 	unsigned int cmd;
 	int i;
-	int primary_needed;
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
@@ -666,11 +675,7 @@ static void mga_dma_dispatch_clear(drm_device_t * dev, int flags,
 	else
 		cmd = MGA_CLEAR_CMD | DC_atype_rstr;
 
-	primary_needed = nbox * 70;
-	if (primary_needed == 0)
-		primary_needed = 70;
-	PRIM_OVERFLOW(dev, dev_priv, primary_needed);
-	PRIMGETPTR(dev_priv);
+	PRIM_OVERFLOW(dev, dev_priv, 35 * MGA_NR_SAREA_CLIPRECTS);
 
 	for (i = 0; i < nbox; i++) {
 		unsigned int height = pbox[i].y2 - pbox[i].y1;
@@ -741,14 +746,12 @@ static void mga_dma_dispatch_swap(drm_device_t * dev)
 	int nbox = sarea_priv->nbox;
 	drm_clip_rect_t *pbox = sarea_priv->boxes;
 	int i;
-	int primary_needed;
+	int pixel_stride = dev_priv->stride / dev_priv->cpp;
+
 	PRIMLOCALS;
 	DRM_DEBUG("%s\n", __FUNCTION__);
 
-	primary_needed = nbox * 5;
-	primary_needed += 65;
-	PRIM_OVERFLOW(dev, dev_priv, primary_needed);
-	PRIMGETPTR(dev_priv);
+	PRIM_OVERFLOW(dev, dev_priv, (MGA_NR_SAREA_CLIPRECTS * 5) + 20);
 
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -758,7 +761,7 @@ static void mga_dma_dispatch_swap(drm_device_t * dev)
 	PRIMOUTREG(MGAREG_DSTORG, dev_priv->frontOffset);
 	PRIMOUTREG(MGAREG_MACCESS, dev_priv->mAccess);
 	PRIMOUTREG(MGAREG_SRCORG, dev_priv->backOffset);
-	PRIMOUTREG(MGAREG_AR5, dev_priv->stride / 2);
+	PRIMOUTREG(MGAREG_AR5, pixel_stride);
 
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
 	PRIMOUTREG(MGAREG_DMAPAD, 0);
@@ -767,7 +770,7 @@ static void mga_dma_dispatch_swap(drm_device_t * dev)
 
 	for (i = 0; i < nbox; i++) {
 		unsigned int h = pbox[i].y2 - pbox[i].y1;
-		unsigned int start = pbox[i].y1 * dev_priv->stride / 2;
+		unsigned int start = pbox[i].y1 * pixel_stride;
 
 		DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
 			  pbox[i].x1, pbox[i].y1, pbox[i].x2, pbox[i].y2);
@@ -817,7 +820,9 @@ int mga_clear_bufs(struct inode *inode, struct file *filp,
 	mga_dma_dispatch_clear(dev, clear.flags,
 			       clear.clear_color, clear.clear_depth);
 	PRIMUPDATE(dev_priv);
+#ifdef __i386__
 	mga_flush_write_combine();
+#endif
 	mga_dma_schedule(dev, 1);
 	return 0;
 }
@@ -847,7 +852,9 @@ 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;
 }
@@ -895,7 +902,9 @@ 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;
 }
@@ -943,7 +952,9 @@ 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;
 }
@@ -990,7 +1001,9 @@ 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;
 }
diff --git a/linux/picker.c b/linux/picker.c
index 0bd8bfd5..f8cfe459 100644
--- a/linux/picker.c
+++ b/linux/picker.c
@@ -17,8 +17,13 @@
 #define CONFIG_AGP 0
 #endif
 
+#ifndef CONFIG_FB_SIS
+#define CONFIG_FB_SIS 0
+#endif
+
 SMP = CONFIG_SMP
 MODVERSIONS = CONFIG_MODVERSIONS
 AGP = CONFIG_AGP
 AGP_MODULE = CONFIG_AGP_MODULE
 RELEASE = UTS_RELEASE
+SIS = CONFIG_FB_SIS
diff --git a/linux/r128_dma.c b/linux/r128_dma.c
index 16f79c1f..d4b75bed 100644
--- a/linux/r128_dma.c
+++ b/linux/r128_dma.c
@@ -68,6 +68,7 @@ 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;
@@ -86,6 +87,7 @@ static void r128_flush_write_combine(void)
 			 "pop %%ebx ;"
 			 "pop %%eax" : /* no outputs */ :  /* no inputs */ );
 }
+#endif
 
 static void r128_status(drm_device_t *dev)
 {
@@ -496,8 +498,10 @@ 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);
@@ -599,8 +603,10 @@ 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);
@@ -766,8 +772,10 @@ 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
diff --git a/linux/r128_drv.c b/linux/r128_drv.c
index fac88247..dd982ab4 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	 "20000719"
+#define R128_DATE	 "20000827"
 #define R128_MAJOR	 1
 #define R128_MINOR	 0
 #define R128_PATCHLEVEL  0
@@ -466,7 +466,7 @@ int r128_open(struct inode *inode, struct file *filp)
 		}
 		spin_unlock(&dev->count_lock);
 	}
-	
+
 	return retcode;
 }
 
@@ -500,7 +500,7 @@ int r128_release(struct inode *inode, struct file *filp)
 		}
 		spin_unlock(&dev->count_lock);
 	}
-	
+
 	unlock_kernel();
 	return retcode;
 }
@@ -656,6 +656,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -720,5 +730,8 @@ int r128_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 #endif
 
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+	unblock_all_signals();
+#endif
 	return 0;
 }
diff --git a/linux/sis_drm_public.h b/linux/sis_drm.h
index dd14a5a5..dd14a5a5 100644
--- a/linux/sis_drm_public.h
+++ b/linux/sis_drm.h
diff --git a/linux/sis_drv.c b/linux/sis_drv.c
index c04561ee..434a1ccd 100644
--- a/linux/sis_drv.c
+++ b/linux/sis_drv.c
@@ -1,5 +1,4 @@
 /* sis.c -- sis driver -*- linux-c -*-
- * Created: Thu Oct  7 10:38:32 1999 by faith@precisioninsight.com
  *
  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -23,15 +22,11 @@
  * 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@precisioninsight.com>
- *    Daryll Strauss <daryll@precisioninsight.com>
- *
  */
 
 #include <linux/config.h>
 #include "drmP.h"
-#include "sis_drm_public.h"
+#include "sis_drm.h"
 #include "sis_drv.h"
 
 #define SIS_NAME	 "sis"
@@ -631,6 +626,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -681,7 +686,10 @@ int sis_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/sis_drv.h b/linux/sis_drv.h
index 50f6efad..24523b8f 100644
--- a/linux/sis_drv.h
+++ b/linux/sis_drv.h
@@ -1,5 +1,4 @@
 /* sis_drv.h -- Private header for sis driver -*- linux-c -*-
- * Created: Thu Oct  7 10:40:04 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All rights reserved.
@@ -23,10 +22,6 @@
  * 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@precisioninsight.com>
- *    Daryll Strauss <daryll@precisioninsight.com>
- * 
  */
 
 /* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/sis_drv.h,v 1.2 2000/08/04 03:51:47 tsi Exp $ */
diff --git a/linux/sis_mm.c b/linux/sis_mm.c
index 1d6a2748..333b5196 100644
--- a/linux/sis_mm.c
+++ b/linux/sis_mm.c
@@ -2,7 +2,7 @@
 
 #define __NO_VERSION__
 #include "drmP.h"
-#include "sis_drm_public.h"
+#include "sis_drm.h"
 #include "sis_ds.h"
 #include "sis_drv.h"
 #include <linux/fb.h>
diff --git a/linux/tdfx_drv.c b/linux/tdfx_drv.c
index 59f10197..07febea1 100644
--- a/linux/tdfx_drv.c
+++ b/linux/tdfx_drv.c
@@ -615,6 +615,16 @@ 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);
+		sigaddset(&dev->sigmask, SIGTTIN);
+		sigaddset(&dev->sigmask, SIGTTOU);
+		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 */
 		}
@@ -679,5 +689,8 @@ int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
 	}
 #endif
 	
+#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
+	unblock_all_signals();
+#endif
 	return 0;
 }