358 	struct circ_buf *xmit;  in ip22zilog_transmit_chars()  local
401 	xmit = &up->port.state->xmit;  in ip22zilog_transmit_chars()
402 	if (uart_circ_empty(xmit))  in ip22zilog_transmit_chars()
408 	writeb(xmit->buf[xmit->tail], &channel->data);  in ip22zilog_transmit_chars()
412 	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in ip22zilog_transmit_chars()
415 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in ip22zilog_transmit_chars()
604 		struct circ_buf *xmit = &port->state->xmit;  in ip22zilog_start_tx()  local
606 		if (uart_circ_empty(xmit))  in ip22zilog_start_tx()
608 		writeb(xmit->buf[xmit->tail], &channel->data);  in ip22zilog_start_tx()
612 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in ip22zilog_start_tx()
615 		if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in ip22zilog_start_tx()