In a number of places we rely on list_empty(&cs->wd_list), however we do not initialize this list_head. Do so upon registration, such that thereafter we can rely on list_empty() correctly reflecting the list membership status. Tested-by: Diego Viola Signed-off-by: Peter Zijlstra (Intel) --- kernel/time/clocksource.c | 2 ++ 1 file changed, 2 insertions(+) --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -332,6 +332,8 @@ static void clocksource_resume_watchdog( static void clocksource_enqueue_watchdog(struct clocksource *cs) { + INIT_LIST_HEAD(&cs->wd_list); + if (cs->flags & CLOCK_SOURCE_MUST_VERIFY) { /* cs is a clocksource to be watched. */ list_add(&cs->wd_list, &watchdog_list);