Commit 7c259045 authored May 15, 2017 by Frederic Weisbecker Committed by Ingo Molnar May 30, 2017

nohz: Reset next_tick cache even when the timer has no regs

Handle tick interrupts whose regs are NULL, out of general paranoia. It happens
when hrtimer_interrupt() is called from non-interrupt contexts, such as hotplug
CPU down events.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 411fe24e

kernel/time/tick-sched.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1202,6 +1202,8 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer)
		*/
		if (regs)
		tick_sched_handle(ts, regs);
		else
		ts->next_tick = 0;

		/* No need to reprogram if we are in idle or full dynticks mode */
		if (unlikely(ts->tick_stopped))