From: Li Zefan <lizefan@huawei.com>
Date: Fri, 14 Feb 2014 08:54:28 +0000 (+0800)
Subject: cgroup: fix locking in cgroupstats_build()
X-Git-Tag: v3.15-rc1~109^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bad34660344f37db8b55ce8bc139bddc7d83af1b;p=pandora-kernel.git

cgroup: fix locking in cgroupstats_build()

css_set_lock has been converted to css_set_rwsem, and rwsem can't nest
inside rcu_read_lock.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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