struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags)
{
	struct rpc_message msg = {
		.rpc_proc = &rpcproc_null,
		.rpc_cred = cred,
	};
	struct rpc_task_setup task_setup_data = {
		.rpc_client = clnt,
		.rpc_message = &msg,
		.callback_ops = &rpc_default_ops,
		.flags = flags,
	};
	return rpc_run_task(&task_setup_data);
}
struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags)
{
	struct rpc_message msg = {
		.rpc_proc = &rpcproc_null,
		.rpc_cred = cred,
	};
	struct rpc_task_setup task_setup_data = {
		.rpc_client = clnt,
		.rpc_message = &msg,
		.callback_ops = &rpc_default_ops,
		.flags = flags,
	};
	return rpc_run_task(&task_setup_data);
}