#define MUX_TX_MAX_SIZE 2048
 
-#define gdm_tty_send(n, d, l, i, c, b) (\
-       n->tty_dev->send_func(n->tty_dev->priv_dev, d, l, i, c, b))
 #define gdm_tty_recv(n, c) (\
        n->tty_dev->recv_func(n->tty_dev->priv_dev, c))
 #define gdm_tty_send_control(n, r, v, d, l) (\
 
        while (1) {
                sending_len = min(MUX_TX_MAX_SIZE, remain);
-               gdm_tty_send(gdm,
-                            (void *)(buf + sent_len),
-                            sending_len,
-                            gdm->index,
-                            gdm_tty_send_complete,
-                            gdm
-                           );
+               gdm->tty_dev->send_func(gdm->tty_dev->priv_dev,
+                                       (void *)(buf + sent_len),
+                                       sending_len,
+                                       gdm->index,
+                                       gdm_tty_send_complete,
+                                       gdm);
                sent_len += sending_len;
                remain -= sending_len;
                if (remain <= 0)