DRI CVS merge: add DRM(calloc)() function, and remove unnecessary TLB

flush after vmap.

drivers/char/drm/drmP.h

@@ -784,6 +784,7 @@ extern void	     DRM(mem_init)(void);
 extern int	     DRM(mem_info)(char *buf, char **start, off_t offset,
 				   int request, int *eof, void *data);
 extern void	     *DRM(alloc)(size_t size, int area);
+extern void	     *DRM(calloc)(size_t nmemb, size_t size, int area);
 extern void	     *DRM(realloc)(void *oldpt, size_t oldsize, size_t size,
 				   int area);
 extern void	     DRM(free)(void *pt, size_t size, int area);

drivers/char/drm/drm_memory.h

@@ -117,10 +117,7 @@ agp_remap (unsigned long offset, unsigned long size, drm_device_t *dev)
 		page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
 	addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
 	vfree(page_map);
-	if (!addr)
-		return NULL;
 
-	flush_tlb_kernel_range((unsigned long) addr, (unsigned long) addr + size);
 	return addr;
 }
 
@@ -224,6 +221,18 @@ void *DRM(alloc)(size_t size, int area)
 	return kmalloc(size, GFP_KERNEL);
 }
 
+/** Wrapper around kmalloc() */
+void *DRM(calloc)(size_t size, size_t nmemb, int area)
+{
+	void *addr;
+
+	addr = kmalloc(size * nmemb, GFP_KERNEL);
+	if (addr != NULL)
+		memset((void *)addr, 0, size * nmemb);
+
+	return addr;
+}
+
 /** Wrapper around kmalloc() and kfree() */
 void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
 {

drivers/char/drm/drm_memory_debug.h

@@ -166,6 +166,17 @@ void *DRM(alloc)(size_t size, int area)
 	return pt;
 }
 
+void *DRM(calloc)(size_t size, size_t nmemb, int area)
+{
+	void *addr;
+
+	addr = DRM(alloc)(nmemb * size, area);
+	if (addr != NULL)
+		memset((void *)addr, 0, size * nmemb);
+
+	return addr;
+}
+
 void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
 {
 	void *pt;