As handled by the kernel thread, work is dequeued first for further actions.
Signed-off-by: Hillf Danton <dhi...@gmail.com>
---
--- a/kernel/stop_machine.c Wed Feb 6 19:57:12 2013
+++ b/kernel/stop_machine.c Wed Feb 6 20:02:12 2013
@@ -334,23 +334,24 @@ static int __cpuinit cpu_stop_cpu_callba
#ifdef CONFIG_HOTPLUG_CPU
case CPU_UP_CANCELED:
case CPU_POST_DEAD:
- {
- struct cpu_stop_work *work;
-
sched_set_stop_task(cpu, NULL);
/* kill the stopper */
kthread_stop(stopper->thread);
/* drain remaining works */
spin_lock_irq(&stopper->lock);
- list_for_each_entry(work, &stopper->works, list)
+ while (!list_empty(&stopper->works)) {
+ struct cpu_stop_work *work;
+ work = list_first_entry(&stopper->works,
+ struct cpu_stop_work, list);
+ list_del_init(&work->list);
cpu_stop_signal_done(work->done, false, 0);
+ }
stopper->enabled = false;
spin_unlock_irq(&stopper->lock);
/* release the stopper */
put_task_struct(stopper->thread);
stopper->thread = NULL;
break;
- }
#endif
}
--
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