From d67d4be56a3ec8d07b1f29aab6095b363085b028 Mon Sep 17 00:00:00 2001
From: Alex Elder <elder@inktank.com>
Date: Fri, 13 Jul 2012 20:35:11 -0500
Subject: 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
--- 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);
 
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