SUNRPC: Cleanup of rpc_task initialisation

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index d9d5c5a..ec97041 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -126,7 +126,7 @@
 int		rpcb_getport_sync(struct sockaddr_in *, __u32, __u32, int);
 void		rpcb_getport_async(struct rpc_task *);
 
-void		rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
+void		rpc_call_setup(struct rpc_task *, const struct rpc_message *, int);
 
 int		rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
 			       int flags, const struct rpc_call_ops *tk_ops,