cgroup: add comment to cgroup_enable_threaded()
commitc705a00d77457b44ba3790fdf0627ecb8593a254
authorTejun Heo <tj@kernel.org>
Tue, 25 Jul 2017 17:20:18 +0000 (25 13:20 -0400)
committerTejun Heo <tj@kernel.org>
Tue, 25 Jul 2017 17:20:18 +0000 (25 13:20 -0400)
tree3af32050b385064ec79eb995841c6a596fcc725b
parent918a8c2c4ea4fab8b7855b8da48bbaf0a733ebb0
cgroup: add comment to cgroup_enable_threaded()

Explain cgroup_enable_threaded() and note that the function can never
be called on the root cgroup.

Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Waiman Long <longman@redhat.com>
kernel/cgroup/cgroup.c