diff options
| -rw-r--r-- | kernel/cgroup.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 9db1a9629a5c..95fc66b16091 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2594,16 +2594,18 @@ retry: * cases, wait till it's gone using offline_waitq. */ cgroup_for_each_live_child(child, cgrp) { - wait_queue_t wait; + DEFINE_WAIT(wait); if (!cgroup_css(child, ss)) continue; + cgroup_get(child); prepare_to_wait(&child->offline_waitq, &wait, TASK_UNINTERRUPTIBLE); mutex_unlock(&cgroup_tree_mutex); schedule(); finish_wait(&child->offline_waitq, &wait); + cgroup_put(child); goto retry; } |