From 16b3ae12337eb1695de0031fe4e030fb7fd6c2d9 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 30 Apr 2018 12:00:11 +0200 Subject: [PATCH] clocksource: Initialize cs->wd_list commit 5b9e886a4af97574ca3ce1147f35545da0e7afc7 upstream. A number of places relies on list_empty(&cs->wd_list), however the list_head does not get initialized. Do so upon registration, such that thereafter it is possible to rely on list_empty() correctly reflecting the list membership status. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Thomas Gleixner Tested-by: Diego Viola Reviewed-by: Rafael J. Wysocki Cc: stable@vger.kernel.org Cc: len.brown@intel.com Cc: rjw@rjwysocki.net Cc: rui.zhang@intel.com Link: https://lkml.kernel.org/r/20180430100344.472662715@infradead.org Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- kernel/time/clocksource.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 03918a19cf2d..3b71d859ee38 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -322,6 +322,8 @@ static void clocksource_enqueue_watchdog(struct clocksource *cs) { unsigned long flags; + INIT_LIST_HEAD(&cs->wd_list); + spin_lock_irqsave(&watchdog_lock, flags); if (cs->flags & CLOCK_SOURCE_MUST_VERIFY) { /* cs is a clocksource to be watched. */