tree 786966087ccd4fd2c97757ce7b722f728c17ca2b
parent ab9a0f196f2f4f080df54402493ea3dc31b5243e
author Lai Jiangshan <laijs@cn.fujitsu.com> 1299741720 +0800
committer Pekka Enberg <penberg@kernel.org> 1299859594 +0200

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>