On Fri, Jul 24, 2015 at 02:43:45PM -0400, Tejun Heo wrote:

It doesn't make sense to print subsystems on mount option or
/proc/PID/cgroup for the default hierarchy.

* cgroup.controllers file at the root of the default hierarchy lists
  the currently attached controllers.

* The default hierarchy is catch-all for unmounted subsystems.

* The default hierarchy doesn't accept any mount options.

Suppress subsystem printing on mount options and /proc/PID/cgroup for
the default hierarchy.

Signed-off-by: Tejun Heo <redacted>
Cc: Li Zefan <redacted>
Cc: Johannes Weiner <redacted>
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Applied to cgroup/for-4.3-unified-base.

Thanks.

-- 
tejun