linux-kernel - [PATCH v2 3/3] slub: add 'likely' macro to inc_slabs

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Date:	Mon, 21 Jan 2013 17:01:27 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Christoph Lameter <cl@...ux-foundation.org>, js1304@...il.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 3/3] slub: add 'likely' macro to inc_slabs_node()

After boot phase, 'n' always exist.
So add 'likely' macro for helping compiler.

Acked-by: Christoph Lameter <cl@...ux.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

diff --git a/mm/slub.c b/mm/slub.c
index 8b95364..ddbd401 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1005,7 +1005,7 @@ static inline void inc_slabs_node(struct kmem_cache *s, int node, int objects)
 	 * dilemma by deferring the increment of the count during
 	 * bootstrap (see early_kmem_cache_node_alloc).
 	 */
-	if (n) {
+	if (likely(n)) {
 		atomic_long_inc(&n->nr_slabs);
 		atomic_long_add(objects, &n->total_objects);
 	}
-- 
1.7.9.5

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