[PATCH -v2 7/7] locking/percpu-rwsem: Add might_sleep() for writer locking

[Peter Zijlstra]

From: Davidlohr Bueso <dave@xxxxxxxxxxxx>

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

Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200108013305.7732-1-dave@xxxxxxxxxxxx
---
 kernel/locking/percpu-rwsem.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/locking/percpu-rwsem.c
+++ b/kernel/locking/percpu-rwsem.c
@@ -212,6 +212,7 @@ static bool readers_active_check(struct
 
 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. */