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>

1 files changed, 9 insertions, 8 deletions

diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 63b117e9eba1..2f3b585b8d7d 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -86,7 +86,7 @@ static DEFINE_SPINLOCK(table_lock);
 /*
  * 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 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
         /*
          * 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 @@ 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);
+        raw_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);
+        raw_spin_unlock_irqrestore(lock, flags);
 }
 
 static void print_name_offset(struct seq_file *m, unsigned long addr)
@@ -348,10 +348,11 @@ static void sync_access(void)
         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 @@ void __init init_timer_stats(void)
         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)