375 	struct circ_buf *xmit;  in pmz_transmit_chars()  local
426 	xmit = &uap->port.state->xmit;  in pmz_transmit_chars()
427 	if (uart_circ_empty(xmit)) {  in pmz_transmit_chars()
435 	write_zsdata(uap, xmit->buf[xmit->tail]);  in pmz_transmit_chars()
438 	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in pmz_transmit_chars()
441 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in pmz_transmit_chars()
654 		struct circ_buf *xmit = &port->state->xmit;  in pmz_start_tx()  local
656 		if (uart_circ_empty(xmit))  in pmz_start_tx()
658 		write_zsdata(uap, xmit->buf[xmit->tail]);  in pmz_start_tx()
660 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in pmz_start_tx()
663 		if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in pmz_start_tx()