diff options
| -rw-r--r-- | kernel/hrtimer.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index fd4b13b131f8..e86827e94c9a 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -773,15 +773,24 @@ void clock_was_set(void) /* * During resume we might have to reprogram the high resolution timer - * interrupt (on the local CPU): + * interrupt on all online CPUs. However, all other CPUs will be + * stopped with IRQs interrupts disabled so the clock_was_set() call + * must be deferred to the softirq. + * + * The one-shot timer has already been programmed to fire immediately + * (see tick_resume_oneshot()) and this interrupt will trigger the + * softirq to run early enough to correctly reprogram the timers on + * all CPUs. */ void hrtimers_resume(void) { + struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases); + WARN_ONCE(!irqs_disabled(), KERN_INFO "hrtimers_resume() called with IRQs enabled!"); - retrigger_next_event(NULL); - timerfd_clock_was_set(); + cpu_base->clock_was_set = 1; + __raise_softirq_irqoff(HRTIMER_SOFTIRQ); } static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer) |