cgroup: Add missing cgroup-v2 PID controller documentation.

Signed-off-by: Hans Ragas <hansr@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hans Ragas 2017-01-10 17:42:34 +00:00 • committed by Tejun Heo
commit 20c56e595c