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Date: Fri, 21 Nov 2008 16:49:13 +0800
From: Lai Jiangshan <laijs@cn.fujitsu.com>
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To: Andrew Morton <akpm@linux-foundation.org>, Paul Menage <menage@google.com>,
       Linux Containers <containers@lists.linux-foundation.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Serge Hallyn <serue@us.ibm.com>
Subject: [PATCHSET] fix CGROUP VS RCU
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current some cgroup struct are protected by RCU.

struct protected by RCU:
	struct css_set, struct cgroup_subsys_state, struct cgroup

pointer protected by RCU:
	struct task_struct.cgroups, struct css_set.subsys[*],
	struct cgroup_subsys_state.cgroup
the last two pointers are readonly pointer!

these patches are fix these structs, and pointers. And a faker:
struct cgroup_subsys.root

Not cleanup all yet.

Thanx, Lai