rbd: kill rbd_update_mapping_size()

Since rbd_update_mapping_size() is now a trivial wrapper, just open
code it in its two callers.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

drivers/block/rbd.c

@@ -3118,15 +3118,6 @@ static int rbd_read_header(struct rbd_device *rbd_dev,
 	return ret;
 }
 
-static void rbd_update_mapping_size(struct rbd_device *rbd_dev)
-{
-	if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
-		return;
-
-	if (rbd_dev->mapping.size != rbd_dev->header.image_size)
-		rbd_dev->mapping.size = rbd_dev->header.image_size;
-}
-
 /*
  * only read the first part of the ondisk header, without the snaps info
  */
@@ -3143,7 +3134,9 @@ static int rbd_dev_v1_refresh(struct rbd_device *rbd_dev)
 
 	/* Update image size, and check for resize of mapped image */
 	rbd_dev->header.image_size = h.image_size;
-	rbd_update_mapping_size(rbd_dev);
+	if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
+		if (rbd_dev->mapping.size != rbd_dev->header.image_size)
+			rbd_dev->mapping.size = rbd_dev->header.image_size;
 
 	/* rbd_dev->header.object_prefix shouldn't change */
 	kfree(rbd_dev->header.snap_sizes);
@@ -4074,7 +4067,9 @@ static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev)
 	ret = rbd_dev_v2_image_size(rbd_dev);
 	if (ret)
 		goto out;
-	rbd_update_mapping_size(rbd_dev);
+	if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
+		if (rbd_dev->mapping.size != rbd_dev->header.image_size)
+			rbd_dev->mapping.size = rbd_dev->header.image_size;
 
 	ret = rbd_dev_v2_snap_context(rbd_dev);
 	dout("rbd_dev_v2_snap_context returned %d\n", ret);