From: Tejun Heo <tj@kernel.org>
Date: Tue, 13 Aug 2013 15:01:53 +0000 (-0400)
Subject: cgroup: always use cgroup_css()
X-Git-Tag: v3.12-rc1~173^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40e93b39cd5b6a347333a95152ce37deef37bbd0;p=pandora-kernel.git

cgroup: always use cgroup_css()

cgroup_css() is the accessor for cgroup->subsys[] but is not used
consistently.  cgroup->subsys[] will become RCU protected and
cgroup_css() will grow synchronization sanity checks.  In preparation,
make all cgroup->subsys[] dereferences use cgroup_css() consistently.

This patch doesn't introduce any functional difference.

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