watchdog: Drop FIFO policy in exit path

When the watchdog thread exits it runs through the exit path with FIFO
priority. There is no point in doing so. Switch back to SCHED_NORMAL
before exiting.

Cc: Don Zickus <dzickus@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1109121337461.2723@ionos
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index e952a1394d265fbbb6804fc8e233e0aaf4ee6fa2..d680381b0e9ccfc6fc0f008ae92e4141aa93ca56 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -321,7 +321,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
  */
 static int watchdog(void *unused)
 {
-       static struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
+       struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
        struct hrtimer *hrtimer = &__raw_get_cpu_var(watchdog_hrtimer);
 
        sched_setscheduler(current, SCHED_FIFO, &param);
@@ -350,7 +350,8 @@ static int watchdog(void *unused)
                set_current_state(TASK_INTERRUPTIBLE);
        }
        __set_current_state(TASK_RUNNING);
-
+       param.sched_priority = 0;
+       sched_setscheduler(current, SCHED_NORMAL, &param);
        return 0;
 }