ceph: fix osd request lru adjustment when sending request

Fix argument order.  We want to move the item to the end of the list, not
change the position of the head.
Signed-off-by: NHenry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: NSage Weil <sage@newdream.net>

fs/ceph/osd_client.c

@@ -661,7 +661,7 @@ static int __send_request(struct ceph_osd_client *osdc,
 	reqhead->reassert_version = req->r_reassert_version;
 
 	req->r_stamp = jiffies;
-	list_move_tail(&osdc->req_lru, &req->r_req_lru_item);
+	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
 
 	ceph_msg_get(req->r_request); /* send consumes a ref */
 	ceph_con_send(&req->r_osd->o_con, req->r_request);