rt_spin_lock() should first do the lock annotation via lockdep and then
do the actual locking. That way we learn about the deadlock from lockdep
before it happens.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
kernel/locking/rtmutex.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 79f49d73e4d0..639cfdaae72f 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1153,8 +1153,8 @@ void __sched rt_spin_lock_slowunlock(struct rt_mutex *lock)
void __lockfunc rt_spin_lock(spinlock_t *lock)
{
migrate_disable();
- rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock);
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
+ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock);
}
EXPORT_SYMBOL(rt_spin_lock);
--
2.14.2
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