Commit c705a00d authored by Tejun Heo's avatar Tejun Heo
Browse files

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: default avatarTejun Heo <tj@kernel.org>
Suggested-by: default avatarWaiman Long <longman@redhat.com>
parent 918a8c2c

kernel/cgroup/cgroup.c

+9 −0
Original line number Diff line number Diff line
@@ -3129,6 +3129,15 @@ static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of, 
	return ret ?: nbytes;

}



/**

 * cgroup_enable_threaded - make @cgrp threaded

 * @cgrp: the target cgroup

 *

 * Called when "threaded" is written to the cgroup.type interface file and

 * tries to make @cgrp threaded and join the parent's resource domain.

 * This function is never called on the root cgroup as cgroup.type doesn't

 * exist on it.

 */

static int cgroup_enable_threaded(struct cgroup *cgrp)

{

	struct cgroup *parent = cgroup_parent(cgrp);