From: Tejun Heo <tj@kernel.org>
Date: Tue, 13 May 2014 16:19:22 +0000 (-0400)
Subject: cgroup: grab cgroup_mutex earlier in cgroup_subtree_control_write()
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~81^2~33
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddab2b6e0e516098efe6d3b69585bb25b1408d61;p=pandora-kernel.git

cgroup: grab cgroup_mutex earlier in cgroup_subtree_control_write()

Move cgroup_lock_live_group() invocation upwards to right below
cgroup_tree_mutex in cgroup_subtree_control_write().  This is to help
the planned locking simplification.

This doesn't make any userland-visible behavioral changes.

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