rangetimer: fix BUG_ON reported by Ingo

There's a small race/chance that, while hrtimers are enabled globally,
they're later not enabled when we're calling the hrtimer_interrupt() function,
which then BUG_ON()'s for that. This patch closes that race/gap.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

parent 2075eb8d

kernel/hrtimer.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -1395,11 +1395,15 @@ void hrtimer_peek_ahead_timers(void)
		unsigned long flags;
		struct tick_device *td;
		struct clock_event_device *dev;

		struct hrtimer_cpu_base *cpu_base;
		if (hrtimer_hres_active())
		return;

		local_irq_save(flags);
		cpu_base = &__get_cpu_var(hrtimer_bases);
		if (!cpu_base->hres_active)
		goto out;

		td = &__get_cpu_var(tick_cpu_device);
		if (!td)
		goto out;