From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Thu, 10 Mar 2011 07:22:00 +0000 (+0800)
Subject: slub,rcu: don't assume the size of struct rcu_head
X-Git-Tag: v2.6.39-rc1~388^2~1^2~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da9a638c6f8fc0633fa94a334f1c053f5e307177;p=pandora-kernel.git

slub,rcu: don't assume the size of struct rcu_head

The size of struct rcu_head may be changed. When it becomes larger,
it will pollute the page array.

We reserve some some bytes for struct rcu_head when a slab
is allocated in this situation.

Changed from V1:
	use VM_BUG_ON instead BUG_ON

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

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