[PATCH] locking/percpu-rwsem: Add might_sleep() for writer locking

[Davidlohr Bueso]

We are missing this annotation in percpu_down_write(). Correct
this.

Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
---

Applies against your queue tree.

 kernel/locking/percpu-rwsem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/locking/percpu-rwsem.c b/kernel/locking/percpu-rwsem.c
index 4cbeeada8d09..08db2abfa00d 100644
--- a/kernel/locking/percpu-rwsem.c
+++ b/kernel/locking/percpu-rwsem.c
@@ -212,6 +212,7 @@ static bool readers_active_check(struct percpu_rw_semaphore *sem)
 
 void percpu_down_write(struct percpu_rw_semaphore *sem)
 {
+	might_sleep();
 	rwsem_acquire(&sem->dep_map, 0, 0, _RET_IP_);
 
 	/* Notify readers to take the slow path. */
-- 
2.16.4