linux-kernel - [PATCH] mm, slab: remove unnecessary unlikely()

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Date:   Sun,  4 Nov 2018 07:50:28 -0500
From:   Yangtao Li <tiny.windzz@...il.com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH] mm, slab: remove unnecessary unlikely()

WARN_ON() already contains an unlikely(), so it's not necessary to use
unlikely.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 mm/slab_common.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 7eb8dc136c1c..4f54684f5435 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1029,10 +1029,8 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
 
 		index = size_index[size_index_elem(size)];
 	} else {
-		if (unlikely(size > KMALLOC_MAX_CACHE_SIZE)) {
-			WARN_ON(1);
+		if (WARN_ON(size > KMALLOC_MAX_CACHE_SIZE))
 			return NULL;
-		}
 		index = fls(size - 1);
 	}
 
-- 
2.17.0