On 09/03/2012 07:33 PM, Glauber Costa wrote:

On 08/24/2012 08:17 PM, Christoph Lameter wrote:

quoted

-__kmem_cache_create (struct kmem_cache *cachep, const char *name, size_t size, size_t align,
-	unsigned long flags, void (*ctor)(void *))
+__kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
 {
 	size_t left_over, slab_size, ralign;
 	gfp_t gfp;

@@ -2385,9 +2383,9 @@ __kmem_cache_create (struct kmem_cache *
 	 * unaligned accesses for some archs when redzoning is used, and makes
 	 * sure any on-slab bufctl's are also correctly aligned.
 	 */
-	if (size & (BYTES_PER_WORD - 1)) {
-		size += (BYTES_PER_WORD - 1);
-		size &= ~(BYTES_PER_WORD - 1);
+	if (cachep->size & (BYTES_PER_WORD - 1)) {
+		cachep->size += (BYTES_PER_WORD - 1);
+		cachep->size &= ~(BYTES_PER_WORD - 1);
 	}

There are still one reference to "size" inside this function that will
break the build. This reference is enclosed inside CONFIG_DEBUG.

Actually, Christoph, it would be a lot cleaner if you would just do

   size_t size = cachep->size;

in the beginning of this function. The resulting patch size would be a
lot smaller since you don't need to patch the references, and would
avoid mistakes like that altogether.


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