Ring no bell if the stopper thread is busy in handling enqueued works.
Signed-off-by: Hillf Danton <dhi...@gmail.com>
---
--- a/kernel/stop_machine.c Wed Feb 6 20:05:44 2013
+++ b/kernel/stop_machine.c Wed Feb 6 20:06:56 2013
@@ -72,8 +72,10 @@ static void cpu_stop_queue_work(struct c
spin_lock_irqsave(&stopper->lock, flags);
if (stopper->enabled) {
+ int wakeup = list_empty(&stopper->works);
list_add_tail(&work->list, &stopper->works);
- wake_up_process(stopper->thread);
+ if (wakeup)
+ wake_up_process(stopper->thread);
} else
cpu_stop_signal_done(work->done, false, 0);
--
--
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