tree 006e4a21f74a16a479e53c1023b00157484c7d68
parent 86cb24f994a67fec0a665fa284666259d1d0834e
author Tejun Heo <tj@kernel.org> 1391455699 -0500
committer Tejun Heo <tj@kernel.org> 1391455699 -0500

cgroup: remove cgroup_root_mutex

cgroup_root_mutex was added to avoid deadlock involving namespace_sem
via cgroup_show_options().  It added a lot of overhead for the small
purpose of it and, because it's nested under cgroup_mutex, it has very
limited usefulness.  The previous patch made cgroup_show_options() not
use cgroup_root_mutex, so nobody needs it anymore.  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>