From: Tejun Heo <tj@kernel.org>
Date: Fri, 14 Jun 2013 02:27:41 +0000 (-0700)
Subject: cgroup: reorder the operations in cgroup_destroy_locked()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~44^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=455050d23e1bfc47ca98e943ad5b2f3a9bbe45fb;p=pandora-kernel.git

cgroup: reorder the operations in cgroup_destroy_locked()

This patch reorders the operations in cgroup_destroy_locked() such
that the userland visible parts happen before css offlining and
removal from the ->sibling list.  This will be used to make css use
percpu refcnt.

While at it, split out CGRP_DEAD related comment from the refcnt
deactivation one and correct / clarify how different guarantees are
met.

While this patch changes the specific order of operations, it
shouldn't cause any noticeable behavior difference.

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