diff options
| -rw-r--r-- | kernel/workqueue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 558733801ac..b59c946433f 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -2138,6 +2138,10 @@ void flush_workqueue(struct workqueue_struct *wq) mutex_lock(&wq->flush_mutex); + /* we might have raced, check again with mutex held */ + if (wq->first_flusher != &this_flusher) + goto out_unlock; + wq->first_flusher = NULL; BUG_ON(!list_empty(&this_flusher.list)); |