Commit 0aaafaab authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar

sched/core: Add missing lockdep_unpin() annotations

Luca and Wanpeng reported two missing annotations that led to
false lockdep complaints. Add the missing annotations.
Reported-by: default avatarLuca Abeni <luca.abeni@unitn.it>
Reported-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: cbce1a68 ("sched,lockdep: Employ lock pinning")
Link: http://lkml.kernel.org/r/20151023095008.GY17308@twins.programming.kicks-ass.netSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 5aa50507
......@@ -2366,8 +2366,15 @@ void wake_up_new_task(struct task_struct *p)
trace_sched_wakeup_new(p);
check_preempt_curr(rq, p, WF_FORK);
#ifdef CONFIG_SMP
if (p->sched_class->task_woken)
if (p->sched_class->task_woken) {
/*
* Nothing relies on rq->lock after this, so its fine to
* drop it.
*/
lockdep_unpin_lock(&rq->lock);
p->sched_class->task_woken(rq, p);
lockdep_pin_lock(&rq->lock);
}
#endif
task_rq_unlock(rq, p, &flags);
}
......
......@@ -668,8 +668,15 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer)
* Queueing this task back might have overloaded rq, check if we need
* to kick someone away.
*/
if (has_pushable_dl_tasks(rq))
if (has_pushable_dl_tasks(rq)) {
/*
* Nothing relies on rq->lock after this, so its safe to drop
* rq->lock.
*/
lockdep_unpin_lock(&rq->lock);
push_dl_task(rq);
lockdep_pin_lock(&rq->lock);
}
#endif
unlock:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment