diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index ea87340af871..61ee85ded6ae 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -4998,16 +4998,15 @@ static int cgroup_destroy_locked(struct cgroup *cgrp) __releases(&cgroup_mutex) __acquires(&cgroup_mutex) { struct cgroup_subsys_state *css; - bool empty; int ssid; lockdep_assert_held(&cgroup_mutex); - /* css_set_rwsem synchronizes access to ->cset_links */ - down_read(&css_set_rwsem); - empty = list_empty(&cgrp->cset_links); - up_read(&css_set_rwsem); - if (!empty) + /* + * Only migration can raise populated from zero and we're already + * holding cgroup_mutex. + */ + if (cgroup_is_populated(cgrp)) return -EBUSY; /* |