watchdog: introduce touch_softlockup_watchdog_sched()

[mirror_ubuntu-eoan-kernel.git] / kernel / watchdog.c

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 18f34cf75f741e2a63db6dc6c522dfa2e03d1a54..9eaf3dbec7e83616f195e38eab56674e56fd728b 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -225,7 +225,15 @@ static void __touch_watchdog(void)
        __this_cpu_write(watchdog_touch_ts, get_timestamp());
 }
 
-void touch_softlockup_watchdog(void)
+/**
+ * touch_softlockup_watchdog_sched - touch watchdog on scheduler stalls
+ *
+ * Call when the scheduler may have stalled for legitimate reasons
+ * preventing the watchdog task from executing - e.g. the scheduler
+ * entering idle state.  This should only be used for scheduler events.
+ * Use touch_softlockup_watchdog() for everything else.
+ */
+void touch_softlockup_watchdog_sched(void)
 {
        /*
         * Preemption can be enabled.  It doesn't matter which CPU's timestamp
@@ -233,6 +241,11 @@ void touch_softlockup_watchdog(void)
         */
        raw_cpu_write(watchdog_touch_ts, 0);
 }
+
+void touch_softlockup_watchdog(void)
+{
+       touch_softlockup_watchdog_sched();
+}
 EXPORT_SYMBOL(touch_softlockup_watchdog);
 
 void touch_all_softlockup_watchdogs(void)