From: Davidlohr Bueso <dave@stgolabs.net>
Date: Tue, 7 Jan 2020 17:33:04 -0800
Subject: locking/percpu-rwsem: Add might_sleep() for writer locking
Patch-mainline: v5.7-rc1
Git-commit: 41f0e29190ac9e38099a37abd1a8a4cb1dc21233
References: bsc#1162702
We are missing this annotation in percpu_down_write(). Correct
this.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20200108013305.7732-1-dave@stgolabs.net
Acked-by: Daniel Wagner <dwagner@suse.de>
---
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 8048a9a255d5..183a3aaa8509 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