[PATCH 01/23] introduce drm_zalloc as a drm_alloc + memset replacement

[m . kozlowski]

Add drm_zalloc().

Signed-off-by: Mariusz Kozlowski <m.kozlowski@xxxxxxxxxx>

 drivers/char/drm/drmP.h             |    7 +++++++
 drivers/char/drm/drm_memory_debug.h |   17 ++++++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)

--- linux-2.6.23-rc3-mm1.orig/drivers/char/drm/drmP.h
+++ linux-2.6.23-rc3-mm1/drivers/char/drm/drmP.h
@@ -1125,10 +1125,17 @@ static __inline__ void *drm_calloc(size_
 {
 	return kcalloc(nmemb, size, GFP_KERNEL);
 }
+
+/** Wrapper around kzalloc() */
+static __inline__ void *drm_zalloc(size_t size, int area)
+{
+	return kzalloc(size, GFP_KERNEL);
+}
 #else
 extern void *drm_alloc(size_t size, int area);
 extern void drm_free(void *pt, size_t size, int area);
 extern void *drm_calloc(size_t nmemb, size_t size, int area);
+extern void *drm_zalloc(size_t size, int area);
 #endif
 
 /*@}*/
--- linux-2.6.23-rc3-mm1.orig/drivers/char/drm/drm_memory_debug.h
+++ linux-2.6.23-rc3-mm1/drivers/char/drm/drm_memory_debug.h
@@ -167,13 +167,24 @@ void *drm_alloc (size_t size, int area) 
 void *drm_calloc (size_t nmemb, size_t size, int area) {
 	void *addr;
 
-	addr = drm_alloc (nmemb * size, area);
-	if (addr != NULL)
-		memset((void *)addr, 0, size * nmemb);
+	addr = drm_alloc(nmemb * size, area);
+	if (!addr)
+		memset(addr, 0, size * nmemb);
 
 	return addr;
 }
 
+void *drm_zalloc(size_t size, int area)
+{
+	void *addr;
+
+	addr = drm_alloc(size, area);
+	if (!addr)
+		memset(addr, 0, size);
+	
+	return addr;
+}
+
 void *drm_realloc (void *oldpt, size_t oldsize, size_t size, int area) {
 	void *pt;
 

--
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