cgroup: make cgroup.threads delegatable

Make cgroup.threads file delegatable.
The behavior of cgroup.threads should follow the behavior of cgroup.procs.

Signed-off-by: Roman Gushchin <guro@fb.com>
Discovered-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 2cf06c274e4c..7e4c44538119 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4447,6 +4447,7 @@ static struct cftype cgroup_base_files[] = {
         },
         {
                 .name = "cgroup.threads",
+                .flags = CFTYPE_NS_DELEGATABLE,
                 .release = cgroup_procs_release,
                 .seq_start = cgroup_threads_start,
                 .seq_next = cgroup_procs_next,