tree 131b91ac521d10c1d574850e749da3bd75032d4b
parent adcde8fbf89625cf57a30c0b712b907f00892c79
author Tejun Heo <tj@kernel.org> 1391031723 -0500
committer Tejun Heo <tj@kernel.org> 1391031723 -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>