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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2013-08-02 11:02:42 +0900 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2013-08-14 18:26:10 +0300 |
| commit | 9de1bc875261411bf0a900e90cfe0c7a31c4917b (patch) | |
| tree | 8452af4e203a28294f86734c17619a048e31c755 /mm/slab_common.c | |
| parent | 68f06650ea63f38e1cca7b5bbd56a9c1b8ac5209 (diff) | |
| download | lwn-9de1bc875261411bf0a900e90cfe0c7a31c4917b.tar.gz lwn-9de1bc875261411bf0a900e90cfe0c7a31c4917b.zip | |
mm, slab_common: add 'unlikely' to size check of kmalloc_slab()
Size is usually below than KMALLOC_MAX_SIZE.
If we add a 'unlikely' macro, compiler can make better code.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 538bade6df7d..f0410eb61741 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -373,7 +373,7 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags) { int index; - if (size > KMALLOC_MAX_SIZE) { + if (unlikely(size > KMALLOC_MAX_SIZE)) { WARN_ON_ONCE(!(flags & __GFP_NOWARN)); return NULL; } |