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-rw-r--r--kernel/time/tick-broadcast.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 60e6c23..19cfb38 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -455,11 +455,26 @@ void tick_suspend_broadcast(void)
raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
-int tick_resume_broadcast(void)
+/*
+ * This is called from tick_resume_local() on a resuming CPU. That's
+ * called from the core resume function, tick_unfreeze() and the magic XEN
+ * resume hackery.
+ *
+ * In none of these cases the broadcast device mode can change and the
+ * bit of the resuming CPU in the broadcast mask is safe as well.
+ */
+bool tick_resume_check_broadcast(void)
+{
+ if (tick_broadcast_device.mode == TICKDEV_MODE_ONESHOT)
+ return false;
+ else
+ return cpumask_test_cpu(smp_processor_id(), tick_broadcast_mask);
+}
+
+void tick_resume_broadcast(void)
{
struct clock_event_device *bc;
unsigned long flags;
- int broadcast = 0;
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
@@ -472,8 +487,6 @@ int tick_resume_broadcast(void)
case TICKDEV_MODE_PERIODIC:
if (!cpumask_empty(tick_broadcast_mask))
tick_broadcast_start_periodic(bc);
- broadcast = cpumask_test_cpu(smp_processor_id(),
- tick_broadcast_mask);
break;
case TICKDEV_MODE_ONESHOT:
if (!cpumask_empty(tick_broadcast_mask))
@@ -482,11 +495,8 @@ int tick_resume_broadcast(void)
}
}
raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
-
- return broadcast;
}
-
#ifdef CONFIG_TICK_ONESHOT
static cpumask_var_t tick_broadcast_oneshot_mask;
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