From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Lameter <clameter@sgi.com>
Subject: Re: select(0, ..) is valid ?
Date: Tue, 15 May 2007 11:36:43 -0700 (PDT)
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 <20070515104453.f901e91f.akpm@linux-foundation.org>
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Cc: Badari Pulavarty <pbadari@us.ibm.com>, netdev@vger.kernel.org,
	lkml <linux-kernel@vger.kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
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On Tue, 15 May 2007, Andrew Morton wrote:

> Perhaps putting a size=0 detector into slab also would speed this
> process up.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6/mm/slab.c
===================================================================
--- linux-2.6.orig/mm/slab.c	2007-05-15 11:32:25.000000000 -0700
+++ linux-2.6/mm/slab.c	2007-05-15 11:35:55.000000000 -0700
@@ -792,6 +792,7 @@ static inline struct kmem_cache *__find_
 	 */
 	BUG_ON(malloc_sizes[INDEX_AC].cs_cachep == NULL);
 #endif
+	WARN_ON_ONCE(size == 0);
 	while (size > csizep->cs_size)
 		csizep++;