locking, sched: Annotate thread_group_cputimer as raw

The thread_group_cputimer lock can be taken in atomic context and therefore
cannot be preempted on -rt - annotate it.

In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 6 deletions

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 58f405b581e7..41440cca55a2 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -274,7 +274,7 @@ void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times)
         struct task_cputime sum;
         unsigned long flags;
 
-        spin_lock_irqsave(&cputimer->lock, flags);
+        raw_spin_lock_irqsave(&cputimer->lock, flags);
         if (!cputimer->running) {
                 cputimer->running = 1;
                 /*
@@ -287,7 +287,7 @@ void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times)
                 update_gt_cputime(&cputimer->cputime, &sum);
         }
         *times = cputimer->cputime;
-        spin_unlock_irqrestore(&cputimer->lock, flags);
+        raw_spin_unlock_irqrestore(&cputimer->lock, flags);
 }
 
 /*
@@ -997,9 +997,9 @@ static void stop_process_timers(struct signal_struct *sig)
         struct thread_group_cputimer *cputimer = &sig->cputimer;
         unsigned long flags;
 
-        spin_lock_irqsave(&cputimer->lock, flags);
+        raw_spin_lock_irqsave(&cputimer->lock, flags);
         cputimer->running = 0;
-        spin_unlock_irqrestore(&cputimer->lock, flags);
+        raw_spin_unlock_irqrestore(&cputimer->lock, flags);
 }
 
 static u32 onecputick;
@@ -1289,9 +1289,9 @@ static inline int fastpath_timer_check(struct task_struct *tsk)
         if (sig->cputimer.running) {
                 struct task_cputime group_sample;
 
-                spin_lock(&sig->cputimer.lock);
+                raw_spin_lock(&sig->cputimer.lock);
                 group_sample = sig->cputimer.cputime;
-                spin_unlock(&sig->cputimer.lock);
+                raw_spin_unlock(&sig->cputimer.lock);
 
                 if (task_cputime_expired(&group_sample, &sig->cputime_expires))
                         return 1;