| Date | Fri, 26 Jul 2019 20:30:54 +0200 | From | Thomas Gleixner <> | Subject | [patch 06/12] watchdog: Mark watchdog_hrtimer to expire in hard interrupt context |
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
The watchdog hrtimer must expire in hard interrupt context even on PREEMPT_RT=y kernels as otherwise the hard/softlockup detection logic would not work.
No functional change.
[ tglx: Split out from larger combo patch. Added changelog ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- kernel/watchdog.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -490,7 +490,7 @@ static void watchdog_enable(unsigned int * Start the timer first to prevent the NMI watchdog triggering * before the timer has a chance to fire. */ - hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); hrtimer->function = watchdog_timer_fn; hrtimer_start(hrtimer, ns_to_ktime(sample_period), HRTIMER_MODE_REL_PINNED);
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