1 files changed, 3 insertions, 0 deletions

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