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>

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;
         }