commit ecb49d1a639acbacfc3771cae5ec07bed5df3847
author Thomas Gleixner <tglx@linutronix.de> Tue Nov 17 16:36:54 2009 +0100
committer Thomas Gleixner <tglx@linutronix.de> Mon Dec 14 23:55:34 2009 +0100
tree 19c8fa91d1f9b1c965cd60653e16d1eb60cd9d3a
parent 239007b8440abff689632f50cdf0f2b9e895b534

hrtimers: Convert to raw_spinlocks

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/timer_stats.c

diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 63b117e..2f3b585 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -86,7 +86,7 @@
 /*
  * Per-CPU lookup locks for fast hash lookup:
  */
-static DEFINE_PER_CPU(spinlock_t, tstats_lookup_lock);
+static DEFINE_PER_CPU(raw_spinlock_t, tstats_lookup_lock);
 
 /*
  * Mutex to serialize state changes with show-stats activities:
@@ -238,7 +238,7 @@
 	/*
 	 * It doesnt matter which lock we take:
 	 */
-	spinlock_t *lock;
+	raw_spinlock_t *lock;
 	struct entry *entry, input;
 	unsigned long flags;
 
@@ -253,7 +253,7 @@
 	input.pid = pid;
 	input.timer_flag = timer_flag;
 
-	spin_lock_irqsave(lock, flags);
+	raw_spin_lock_irqsave(lock, flags);
 	if (!timer_stats_active)
 		goto out_unlock;
 
@@ -264,7 +264,7 @@
 		atomic_inc(&overflow_count);
 
  out_unlock:
-	spin_unlock_irqrestore(lock, flags);
+	raw_spin_unlock_irqrestore(lock, flags);
 }
 
 static void print_name_offset(struct seq_file *m, unsigned long addr)
@@ -348,10 +348,11 @@
 	int cpu;
 
 	for_each_online_cpu(cpu) {
-		spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
-		spin_lock_irqsave(lock, flags);
+		raw_spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
+
+		raw_spin_lock_irqsave(lock, flags);
 		/* nothing */
-		spin_unlock_irqrestore(lock, flags);
+		raw_spin_unlock_irqrestore(lock, flags);
 	}
 }
 
@@ -409,7 +410,7 @@
 	int cpu;
 
 	for_each_possible_cpu(cpu)
-		spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
+		raw_spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
 }
 
 static int __init init_tstats_procfs(void)