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 --- include/linux/clocksource.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/clocksource.h') diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index e315d04a2fd9..cfc75848a35d 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -62,6 +62,8 @@ struct module; * @archdata: arch-specific data * @suspend: suspend function for the clocksource, if necessary * @resume: resume function for the clocksource, if necessary + * @mark_unstable: Optional function to inform the clocksource driver that + * the watchdog marked the clocksource unstable * @owner: module reference, must be set by clocksource in modules * * Note: This struct is not used in hotpathes of the timekeeping code @@ -93,6 +95,7 @@ struct clocksource { unsigned long flags; void (*suspend)(struct clocksource *cs); void (*resume)(struct clocksource *cs); + void (*mark_unstable)(struct clocksource *cs); /* private: */ #ifdef CONFIG_CLOCKSOURCE_WATCHDOG -- cgit v1.2.3