Merge commit 'v3.1-rc9' into fbdev-next

1 files changed, 6 insertions, 1 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 25fb1b0e53fa..1783aabc6128 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2412,8 +2412,13 @@ reflush:
 
         for_each_cwq_cpu(cpu, wq) {
                 struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+                bool drained;
 
-                if (!cwq->nr_active && list_empty(&cwq->delayed_works))
+                spin_lock_irq(&cwq->gcwq->lock);
+                drained = !cwq->nr_active && list_empty(&cwq->delayed_works);
+                spin_unlock_irq(&cwq->gcwq->lock);
+
+                if (drained)
                         continue;
 
                 if (++flush_cnt == 10 ||