diff options
| author | Christoph Lameter <clameter@sgi.com> | 2007-07-17 04:03:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:01 -0700 |
| commit | 6cb8f91320d3e720351c21741da795fed580b21b (patch) | |
| tree | c9f73c8b82cd0f6c534939b8b9f36e8615b0ab2d /include/linux/slub_def.h | |
| parent | ef2ad80c7d255ed0449eda947c2d700635b7e0f5 (diff) | |
Slab allocators: consistent ZERO_SIZE_PTR support and NULL result semantics
Define ZERO_OR_NULL_PTR macro to be able to remove the checks from the
allocators. Move ZERO_SIZE_PTR related stuff into slab.h.
Make ZERO_SIZE_PTR work for all slab allocators and get rid of the
WARN_ON_ONCE(size == 0) that is still remaining in SLAB.
Make slub return NULL like the other allocators if a too large memory segment
is requested via __kmalloc.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/slub_def.h')
| -rw-r--r-- | include/linux/slub_def.h | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index a582f677152..579b0a22858 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -159,18 +159,6 @@ static inline struct kmem_cache *kmalloc_slab(size_t size) #define SLUB_DMA 0 #endif - -/* - * ZERO_SIZE_PTR will be returned for zero sized kmalloc requests. - * - * Dereferencing ZERO_SIZE_PTR will lead to a distinct access fault. - * - * ZERO_SIZE_PTR can be passed to kfree though in the same way that NULL can. - * Both make kfree a no-op. - */ -#define ZERO_SIZE_PTR ((void *)16) - - void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); |