fs: assert that open_mutex isn't held over holder ops

With recent block level changes we should never be in a situation where
we hold disk->open_mutex when calling into these helpers. So assert that
in the code.

Signed-off-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Reviewed-by: Jens Axboe <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/super.c b/fs/super.c
index 799b8db1931e..c7b452e12e4c 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1433,6 +1433,7 @@ static struct super_block *bdev_super_lock_shared(struct block_device *bdev)
 
 	lockdep_assert_held(&bdev->bd_holder_lock);
 	lockdep_assert_not_held(&sb->s_umount);
+	lockdep_assert_not_held(&bdev->bd_disk->open_mutex);
 
 	/* Make sure sb doesn't go away from under us */
 	spin_lock(&sb_lock);