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>
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 58f405b..41440cc 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -274,7 +274,7 @@
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 @@
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 @@
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 @@
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;
