timer_stats: Convert to atomic_spin_lock

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

kernel/time/timer_stats.c

@@ -81,12 +81,12 @@ struct entry {
 /*
  * Spinlock protecting the tables - not taken during lookup:
  */
-static DEFINE_SPINLOCK(table_lock);
+static DEFINE_ATOMIC_SPINLOCK(table_lock);
 
 /*
  * Per-CPU lookup locks for fast hash lookup:
  */
-static DEFINE_PER_CPU(spinlock_t, lookup_lock);
+static DEFINE_PER_CPU(atomic_spinlock_t, lookup_lock);
 
 /*
  * Mutex to serialize state changes with show-stats activities:
@@ -188,7 +188,7 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm)
 	prev = NULL;
 	curr = *head;
 
-	spin_lock(&table_lock);
+	atomic_spin_lock(&table_lock);
 	/*
 	 * Make sure we have not raced with another CPU:
 	 */
@@ -215,7 +215,7 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm)
 			*head = curr;
 	}
  out_unlock:
-	spin_unlock(&table_lock);
+	atomic_spin_unlock(&table_lock);
 
 	return curr;
 }
@@ -238,7 +238,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
 	/*
 	 * It doesnt matter which lock we take:
 	 */
-	spinlock_t *lock;
+	atomic_spinlock_t *lock;
 	struct entry *entry, input;
 	unsigned long flags;
 
@@ -253,7 +253,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
 	input.pid = pid;
 	input.timer_flag = timer_flag;
 
-	spin_lock_irqsave(lock, flags);
+	atomic_spin_lock_irqsave(lock, flags);
 	if (!timer_stats_active)
 		goto out_unlock;
 
@@ -264,7 +264,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
 		atomic_inc(&overflow_count);
 
  out_unlock:
-	spin_unlock_irqrestore(lock, flags);
+	atomic_spin_unlock_irqrestore(lock, flags);
 }
 
 static void print_name_offset(struct seq_file *m, unsigned long addr)
@@ -348,9 +348,9 @@ static void sync_access(void)
 	int cpu;
 
 	for_each_online_cpu(cpu) {
-		spin_lock_irqsave(&per_cpu(lookup_lock, cpu), flags);
+		atomic_spin_lock_irqsave(&per_cpu(lookup_lock, cpu), flags);
 		/* nothing */
-		spin_unlock_irqrestore(&per_cpu(lookup_lock, cpu), flags);
+		atomic_spin_unlock_irqrestore(&per_cpu(lookup_lock, cpu), flags);
 	}
 }
 
@@ -408,7 +408,7 @@ void __init init_timer_stats(void)
 	int cpu;
 
 	for_each_possible_cpu(cpu)
-		spin_lock_init(&per_cpu(lookup_lock, cpu));
+		atomic_spin_lock_init(&per_cpu(lookup_lock, cpu));
 }
 
 static int __init init_tstats_procfs(void)