From 12907fbb1a691807bb0420a27126e15934cb7954 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 15 Dec 2016 11:44:28 +0100 Subject: sched/clock, clocksource: Add optional cs::mark_unstable() method PeterZ reported that we'd fail to mark the TSC unstable when the clocksource watchdog finds it unsuitable. Allow a clocksource to run a custom action when its being marked unstable and hook up the TSC unstable code. Reported-by: Peter Zijlstra (Intel) Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- kernel/time/clocksource.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel/time/clocksource.c') diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 665985b0a89a..93621ae718d3 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -141,6 +141,10 @@ static void __clocksource_unstable(struct clocksource *cs) { cs->flags &= ~(CLOCK_SOURCE_VALID_FOR_HRES | CLOCK_SOURCE_WATCHDOG); cs->flags |= CLOCK_SOURCE_UNSTABLE; + + if (cs->mark_unstable) + cs->mark_unstable(cs); + if (finished_booting) schedule_work(&watchdog_work); } -- cgit v1.2.3