1 files changed, 36 insertions, 0 deletions

diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 12b3efeb9f6f..5567745470f7 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -284,6 +284,42 @@ void tick_shutdown_broadcast(unsigned int *cpup)
         spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
+void tick_suspend_broadcast(void)
+{
+        struct clock_event_device *bc;
+        unsigned long flags;
+
+        spin_lock_irqsave(&tick_broadcast_lock, flags);
+
+        bc = tick_broadcast_device.evtdev;
+        if (bc && tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC)
+                clockevents_set_mode(bc, CLOCK_EVT_MODE_SHUTDOWN);
+
+        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+}
+
+int tick_resume_broadcast(void)
+{
+        struct clock_event_device *bc;
+        unsigned long flags;
+        int broadcast = 0;
+
+        spin_lock_irqsave(&tick_broadcast_lock, flags);
+
+        bc = tick_broadcast_device.evtdev;
+        if (bc) {
+                if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC &&
+                    !cpus_empty(tick_broadcast_mask))
+                        tick_broadcast_start_periodic(bc);
+
+                broadcast = cpu_isset(smp_processor_id(), tick_broadcast_mask);
+        }
+        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+
+        return broadcast;
+}
+
+
 #ifdef CONFIG_TICK_ONESHOT
 
 static cpumask_t tick_broadcast_oneshot_mask;