[PATCH 3/5] clocksource: Initialize cs->wd_list

[Peter Zijlstra <peterz@infradead.org>]

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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 <diego.viola@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 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);