[PATCH 5/6] rbd: remove the ->set_read_only method

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Now that the hardware read-only state can't be changed by the BLKROSET
ioctl, the code in this method is not required anymore.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Acked-by: Ilya Dryomov <idryomov@xxxxxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
 drivers/block/rbd.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 59cfe71d0b3a39..bbb88eb009e0ba 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -692,29 +692,10 @@ static void rbd_release(struct gendisk *disk, fmode_t mode)
 	put_device(&rbd_dev->dev);
 }
 
-static int rbd_set_read_only(struct block_device *bdev, bool ro)
-{
-	struct rbd_device *rbd_dev = bdev->bd_disk->private_data;
-
-	/*
-	 * Both images mapped read-only and snapshots can't be marked
-	 * read-write.
-	 */
-	if (!ro) {
-		if (rbd_is_ro(rbd_dev))
-			return -EROFS;
-
-		rbd_assert(!rbd_is_snap(rbd_dev));
-	}
-
-	return 0;
-}
-
 static const struct block_device_operations rbd_bd_ops = {
 	.owner			= THIS_MODULE,
 	.open			= rbd_open,
 	.release		= rbd_release,
-	.set_read_only		= rbd_set_read_only,
 };
 
 /*
-- 
2.29.2

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