From: Tejun Heo <tj@kernel.org>
Date: Tue, 13 May 2014 16:19:23 +0000 (-0400)
Subject: cgroup: use cgroup_kn_lock_live() in other cgroup kernfs methods
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~81^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e76ecaeef65c497153ceacf59c2e21c070d43f64;p=pandora-kernel.git

cgroup: use cgroup_kn_lock_live() in other cgroup kernfs methods

Make __cgroup_procs_write() and cgroup_release_agent_write() use
cgroup_kn_lock_live() and cgroup_kn_unlock() instead of
cgroup_lock_live_group().  This puts the operations under both
cgroup_tree_mutex and cgroup_mutex protection without circular
dependency from kernfs active protection.  Also, this means that
cgroup_mutex is no longer nested below kernfs active protection.
There is no longer any place where the two locks interact.

This leaves cgroup_lock_live_group() without any user.  Removed.

This will help simplifying cgroup locking.

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

Reading git-diff-tree failed