Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clockevents: Set noop handler in clockevents_exchange_device()
  tick-broadcast: Stop active broadcast device when replacing it
  clocksource: Fix bug with max_deferment margin calculation
  rtc: Fix some bugs that allowed accumulating time drift in suspend/resume
  rtc: Disable the alarm in the hardware

3 files changed, 4 insertions, 3 deletions

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 1ecd6ba36d6c..c4eb71c8b2ea 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -387,6 +387,7 @@ void clockevents_exchange_device(struct clock_event_device *old,
          * released list and do a notify add later.
          */
         if (old) {
+                old->event_handler = clockevents_handle_noop;
                 clockevents_set_mode(old, CLOCK_EVT_MODE_UNUSED);
                 list_del(&old->list);
                 list_add(&old->list, &clockevents_released);
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index cfc65e1eb9fb..da2f760e780c 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -548,7 +548,7 @@ static u64 clocksource_max_deferment(struct clocksource *cs)
          * note a margin of 12.5% is used because this can be computed with
          * a shift, versus say 10% which would require division.
          */
-        return max_nsecs - (max_nsecs >> 5);
+        return max_nsecs - (max_nsecs >> 3);
 }
 
 #ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
@@ -669,7 +669,7 @@ void __clocksource_updatefreq_scale(struct clocksource *cs, u32 scale, u32 freq)
          * ~ 0.06ppm granularity for NTP. We apply the same 12.5%
          * margin as we do in clocksource_max_deferment()
          */
-        sec = (cs->mask - (cs->mask >> 5));
+        sec = (cs->mask - (cs->mask >> 3));
         do_div(sec, freq);
         do_div(sec, scale);
         if (!sec)
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index f954282d9a82..fd4a7b1625a2 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -71,7 +71,7 @@ int tick_check_broadcast_device(struct clock_event_device *dev)
              (dev->features & CLOCK_EVT_FEAT_C3STOP))
                 return 0;
 
-        clockevents_exchange_device(NULL, dev);
+        clockevents_exchange_device(tick_broadcast_device.evtdev, dev);
         tick_broadcast_device.evtdev = dev;
         if (!cpumask_empty(tick_get_broadcast_mask()))
                 tick_broadcast_start_periodic(dev);