commit b5f91da0a6973bb6f9ff3b91b0e92c0773a458f3
author Thomas Gleixner <tglx@linutronix.de> Tue Dec 08 12:40:31 2009 +0100
committer Thomas Gleixner <tglx@linutronix.de> Mon Dec 14 23:55:34 2009 +0100
tree 911ad0eeb484ce9309504fcf5a031403ad47ce84
parent d192c47f25daa98996c7eae543d8a27e41247ec2

clockevents: Convert to raw_spinlock

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>

kernel/time/clockevents.c

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 20a8920..3d5fc0f 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -30,7 +30,7 @@
 static RAW_NOTIFIER_HEAD(clockevents_chain);
 
 /* Protection for the above */
-static DEFINE_SPINLOCK(clockevents_lock);
+static DEFINE_RAW_SPINLOCK(clockevents_lock);
 
 /**
  * clockevents_delta2ns - Convert a latch value (device ticks) to nanoseconds
@@ -141,9 +141,9 @@
 	unsigned long flags;
 	int ret;
 
-	spin_lock_irqsave(&clockevents_lock, flags);
+	raw_spin_lock_irqsave(&clockevents_lock, flags);
 	ret = raw_notifier_chain_register(&clockevents_chain, nb);
-	spin_unlock_irqrestore(&clockevents_lock, flags);
+	raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 
 	return ret;
 }
@@ -185,13 +185,13 @@
 	BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
 	BUG_ON(!dev->cpumask);
 
-	spin_lock_irqsave(&clockevents_lock, flags);
+	raw_spin_lock_irqsave(&clockevents_lock, flags);
 
 	list_add(&dev->list, &clockevent_devices);
 	clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev);
 	clockevents_notify_released();
 
-	spin_unlock_irqrestore(&clockevents_lock, flags);
+	raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 }
 EXPORT_SYMBOL_GPL(clockevents_register_device);
 
@@ -241,7 +241,7 @@
 	struct list_head *node, *tmp;
 	unsigned long flags;
 
-	spin_lock_irqsave(&clockevents_lock, flags);
+	raw_spin_lock_irqsave(&clockevents_lock, flags);
 	clockevents_do_notify(reason, arg);
 
 	switch (reason) {
@@ -256,7 +256,7 @@
 	default:
 		break;
 	}
-	spin_unlock_irqrestore(&clockevents_lock, flags);
+	raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 }
 EXPORT_SYMBOL_GPL(clockevents_notify);
 #endif