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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2019-07-26 20:30:54 +0200
committerThomas Gleixner <tglx@linutronix.de>2019-08-01 20:51:20 +0200
commitd2ab4cf4943576fb060b8a69341d9e0c2a952ba7 (patch)
treed3b61f7a0313b00bed39899688ad3d5ccf9690c8 /kernel
parent30f9028b6c43fd17c006550594ea3dbb87afbf80 (diff)
downloadlinux-d2ab4cf4943576fb060b8a69341d9e0c2a952ba7.tar.bz2
watchdog: Mark watchdog_hrtimer to expire in hard interrupt context
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> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20190726185753.262895510@linutronix.de
Diffstat (limited to 'kernel')
-rw-r--r--kernel/watchdog.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 7f9e7b9306fe..f41334ef0971 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -490,10 +490,10 @@ static void watchdog_enable(unsigned int cpu)
* 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);
+ HRTIMER_MODE_REL_PINNED_HARD);
/* Initialize timestamp */
__touch_watchdog();