[GIT PULL] timers/nohz fix

[Ingo Molnar]

Linus,

Please pull the latest timers-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
timers-urgent-for-linus

   # HEAD: 7bdb59f1ad474bd7161adc8f923cdef10f2638d1 tick/nohz: Fix possible 
missing clock reprog after tick soft restart

Fix a sporadic missed timer hw reprogramming bug that can result in random 
delays.

 Thanks,

        Ingo

------------------>
Frederic Weisbecker (1):
      tick/nohz: Fix possible missing clock reprog after tick soft restart


 kernel/time/tick-sched.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 74e0388cc88d..fc6f740d0277 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -725,6 +725,11 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched 
*ts,
                 */
                if (delta == 0) {
                        tick_nohz_restart(ts, now);
+                       /*
+                        * Make sure next tick stop doesn't get fooled by past
+                        * clock deadline
+                        */
+                       ts->next_tick = 0;
                        goto out;
                }
        }