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locking, sched: Annotate thread_group_cputimer as raw

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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>
This commit is contained in:
Thomas Gleixner
2009-07-25 18:56:56 +02:00
committed by Ingo Molnar
parent 07354eb1a7
commit ee30a7b2fc
4 changed files with 15 additions and 15 deletions
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12
kernel/posix-cpu-timers.c
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@@ -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;