[PATCH] timer-irq-driven soft-watchdog, cleanups

Make the softlockup detector purely timer-interrupt driven, removing
softirq-context (timer) dependencies.  This means that if the softlockup
watchdog triggers, it has truly observed a longer than 10 seconds
scheduling delay of a SCHED_FIFO prio 99 task.

(the patch also turns off the softlockup detector during the initial bootup
phase and does small style fixes)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/timer.c b/kernel/timer.c
index 4427e725ccd..17d956cebcb 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -915,6 +915,7 @@ static void run_timer_softirq(struct softirq_action *h)
 void run_local_timers(void)
 {
         raise_softirq(TIMER_SOFTIRQ);
+        softlockup_tick();
 }
 
 /*
@@ -945,7 +946,6 @@ void do_timer(struct pt_regs *regs)
         /* prevent loading jiffies before storing new jiffies_64 value. */
         barrier();
         update_times();
-        softlockup_tick(regs);
 }
 
 #ifdef __ARCH_WANT_SYS_ALARM