Merge branch 'timers/urgent' into timers/core

Reason: Get upstream fixes and kfree_rcu which is necessary for a
follow up patch.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 11 insertions, 1 deletions

diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 827e0f862da4..c7218d132738 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -524,10 +524,11 @@ static void tick_broadcast_init_next_event(struct cpumask *mask,
  */
 void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
 {
+        int cpu = smp_processor_id();
+
         /* Set it up only once ! */
         if (bc->event_handler != tick_handle_oneshot_broadcast) {
                 int was_periodic = bc->mode == CLOCK_EVT_MODE_PERIODIC;
-                int cpu = smp_processor_id();
 
                 bc->event_handler = tick_handle_oneshot_broadcast;
                 clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
@@ -553,6 +554,15 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
                         tick_broadcast_set_event(tick_next_period, 1);
                 } else
                         bc->next_event.tv64 = KTIME_MAX;
+        } else {
+                /*
+                 * The first cpu which switches to oneshot mode sets
+                 * the bit for all other cpus which are in the general
+                 * (periodic) broadcast mask. So the bit is set and
+                 * would prevent the first broadcast enter after this
+                 * to program the bc device.
+                 */
+                tick_broadcast_clear_oneshot(cpu);
         }
 }