From: Tejun Heo <tj@kernel.org>
Date: Sat, 29 Jun 2013 00:07:30 +0000 (-0700)
Subject: cgroup: move number_of_cgroups test out of rebind_subsystems() into cgroup_remount()
X-Git-Tag: v3.12-rc1~173^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f172e67cf9d842bc646d0f66792e38435a334b1e;p=pandora-kernel.git

cgroup: move number_of_cgroups test out of rebind_subsystems() into cgroup_remount()

rebind_subsystems() currently fails if the hierarchy has any !root
cgroups; however, on the planned unified hierarchy,
rebind_subsystems() will be used while populated.  Move the test to
cgroup_remount(), which is the only place the test is necessary
anyway.

As it's impossible for the other two callers of rebind_subsystems() to
have populated hierarchy, this doesn't make any behavior changes.

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