linux-kernel - [patch] slub: remove impossible condition

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Message-ID: <alpine.DEB.2.00.1001151249040.11990@chino.kir.corp.google.com>
Date:	Fri, 15 Jan 2010 12:49:56 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [patch] slub: remove impossible condition

`s' cannot be NULL if kmalloc_caches is not NULL.

This conditional would trigger a NULL pointer on `s', anyway, since it is
immediately derefernced if true.

Cc: Christoph Lameter <cl@...ux-foundation.org>
Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 mm/slub.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2641,7 +2641,7 @@ static noinline struct kmem_cache *dma_kmalloc_cache(int index, gfp_t flags)
 	if (slab_state >= SYSFS)
 		slabflags |= __SYSFS_ADD_DEFERRED;
 
-	if (!s || !text || !kmem_cache_open(s, flags, text,
+	if (!text || !kmem_cache_open(s, flags, text,
 			realsize, ARCH_KMALLOC_MINALIGN, slabflags, NULL)) {
 		s->size = 0;
 		kfree(text);
--
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