1451 				CIRC_CNT(info->xmit.head,  in rs_stop()
1452 					 info->xmit.tail,SERIAL_XMIT_SIZE)));  in rs_stop()
1476 				CIRC_CNT(info->xmit.head,  in rs_start()
1477 					 info->xmit.tail,SERIAL_XMIT_SIZE)));  in rs_start()
1486 		    info->xmit.head != info->xmit.tail && info->xmit.buf)  in rs_start()
1576 	info->xmit.tail = (info->xmit.tail + sentl) & (SERIAL_XMIT_SIZE - 1);  in transmit_chars_dma()
1580 	if (CIRC_CNT(info->xmit.head,  in transmit_chars_dma()
1581 		     info->xmit.tail,  in transmit_chars_dma()
1587 	c = CIRC_CNT_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in transmit_chars_dma()
1618 	descr->buf = virt_to_phys(info->xmit.buf + info->xmit.tail);  in transmit_chars_dma()
2458 	if (info->xmit.head == info->xmit.tail  in handle_ser_tx_interrupt()
2466 	DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));  in handle_ser_tx_interrupt()
2469 	info->ioport[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];  in handle_ser_tx_interrupt()
2470 	info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);  in handle_ser_tx_interrupt()
2472 	if (info->xmit.head == info->xmit.tail) {  in handle_ser_tx_interrupt()
2494 	if (CIRC_CNT(info->xmit.head,  in handle_ser_tx_interrupt()
2495 		     info->xmit.tail,  in handle_ser_tx_interrupt()
2652 	if (info->xmit.buf)  in startup()
2655 		info->xmit.buf = (unsigned char *) xmit_page;  in startup()
2658 	printk("starting up ttyS%d (xmit_buf 0x%p)...\n", info->line, info->xmit.buf);  in startup()
2707 	info->xmit.head = info->xmit.tail = 0;  in startup()
2802 	if (info->xmit.buf) {  in shutdown()
2803 		free_page((unsigned long)info->xmit.buf);  in shutdown()
2804 		info->xmit.buf = NULL;  in shutdown()
2990 	    info->xmit.head == info->xmit.tail ||  in rs_flush_chars()
2992 	    !info->xmit.buf)  in rs_flush_chars()
3015 	if (!info->xmit.buf)  in rs_raw_write()
3038 			c = CIRC_SPACE_TO_END(info->xmit.head,  in rs_raw_write()
3039 					      info->xmit.tail,  in rs_raw_write()
3047 			memcpy(info->xmit.buf + info->xmit.head, buf, c);  in rs_raw_write()
3048 			info->xmit.head = (info->xmit.head + c) &  in rs_raw_write()
3062 	if (info->xmit.head != info->xmit.tail &&  in rs_raw_write()
3142 	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in rs_write_room()
3155 	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in rs_chars_in_buffer()
3167 	info->xmit.head = info->xmit.tail = 0;  in rs_flush_buffer()
3366 	if (info->xmit.head != info->xmit.tail ||  in get_lsr_info()
3782 	while (info->xmit.head != info->xmit.tail || /* More in send queue */  in rs_wait_until_sent()
4106 	tmp = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in seq_line_info()
4319 		info->xmit.buf = NULL;  in rs_init()
4320 		info->xmit.tail = info->xmit.head = 0;  in rs_init()