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| author |   Peter Zijlstra <peterz@infradead.org> | 2015-10-23 11:50:08 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-10-23 12:02:10 +0200 |
| commit | 0aaafaabfcba8aa991913cd3280a5dbf7f111a2a (patch) | |
| tree | 881f1c204d77a1b216608cccb402908fabc34a29 /kernel/sched/deadline.c | |
| parent | sched/deadline: Fix migration of SCHED_DEADLINE tasks (diff) | |
| download | linux-dev-0aaafaabfcba8aa991913cd3280a5dbf7f111a2a.tar.xz linux-dev-0aaafaabfcba8aa991913cd3280a5dbf7f111a2a.zip | |
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: Luca Abeni <luca.abeni@unitn.it>
Reported-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Peter 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: cbce1a686700 ("sched,lockdep: Employ lock pinning")
Link: http://lkml.kernel.org/r/20151023095008.GY17308@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sched/deadline.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 142df2668e5d..8b0a15e285f9 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -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: |