rbd: pass null version pointer in add_snap()

rbd_header_add_snap() passes the address of a version variable to
rbd_req_sync_exec(), but it ignores the result.  Just pass a null
pointer instead.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 28670c0..e1fa12b 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1668,7 +1668,6 @@ static int rbd_header_add_snap(struct rbd_device *rbd_dev,
        u64 new_snapid;
        int ret;
        void *data, *p, *e;
-       u64 ver;
        struct ceph_mon_client *monc;
 
        /* we should create a snapshot only if we're pointing at the head */
@@ -1693,7 +1692,7 @@ static int rbd_header_add_snap(struct rbd_device *rbd_dev,
 
        ret = rbd_req_sync_exec(rbd_dev, rbd_dev->header_name,
                                "rbd", "snap_add",
-                               data, p - data, &ver);
+                               data, p - data, NULL);
 
        kfree(data);