1410 				CIRC_CNT(info->xmit.head,  in rs_stop()
1411 					 info->xmit.tail,SERIAL_XMIT_SIZE)));  in rs_stop()
1435 				CIRC_CNT(info->xmit.head,  in rs_start()
1436 					 info->xmit.tail,SERIAL_XMIT_SIZE)));  in rs_start()
1445 		    info->xmit.head != info->xmit.tail && info->xmit.buf)  in rs_start()
1535 	info->xmit.tail = (info->xmit.tail + sentl) & (SERIAL_XMIT_SIZE - 1);  in transmit_chars_dma()
1539 	if (CIRC_CNT(info->xmit.head,  in transmit_chars_dma()
1540 		     info->xmit.tail,  in transmit_chars_dma()
1546 	c = CIRC_CNT_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in transmit_chars_dma()
1577 	descr->buf = virt_to_phys(info->xmit.buf + info->xmit.tail);  in transmit_chars_dma()
2416 	if (info->xmit.head == info->xmit.tail  in handle_ser_tx_interrupt()
2424 	DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));  in handle_ser_tx_interrupt()
2427 	info->ioport[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];  in handle_ser_tx_interrupt()
2428 	info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);  in handle_ser_tx_interrupt()
2430 	if (info->xmit.head == info->xmit.tail) {  in handle_ser_tx_interrupt()
2452 	if (CIRC_CNT(info->xmit.head,  in handle_ser_tx_interrupt()
2453 		     info->xmit.tail,  in handle_ser_tx_interrupt()
2610 	if (info->xmit.buf)  in startup()
2613 		info->xmit.buf = (unsigned char *) xmit_page;  in startup()
2616 	printk("starting up ttyS%d (xmit_buf 0x%p)...\n", info->line, info->xmit.buf);  in startup()
2665 	info->xmit.head = info->xmit.tail = 0;  in startup()
2760 	if (info->xmit.buf) {  in shutdown()
2761 		free_page((unsigned long)info->xmit.buf);  in shutdown()
2762 		info->xmit.buf = NULL;  in shutdown()
2935 	    info->xmit.head == info->xmit.tail ||  in rs_flush_chars()
2937 	    !info->xmit.buf)  in rs_flush_chars()
2960 	if (!info->xmit.buf)  in rs_raw_write()
2983 			c = CIRC_SPACE_TO_END(info->xmit.head,  in rs_raw_write()
2984 					      info->xmit.tail,  in rs_raw_write()
2992 			memcpy(info->xmit.buf + info->xmit.head, buf, c);  in rs_raw_write()
2993 			info->xmit.head = (info->xmit.head + c) &  in rs_raw_write()
3007 	if (info->xmit.head != info->xmit.tail &&  in rs_raw_write()
3087 	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in rs_write_room()
3100 	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in rs_chars_in_buffer()
3112 	info->xmit.head = info->xmit.tail = 0;  in rs_flush_buffer()
3307 	if (info->xmit.head != info->xmit.tail ||  in get_lsr_info()
3712 	while (info->xmit.head != info->xmit.tail || /* More in send queue */  in rs_wait_until_sent()
4005 	tmp = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);  in seq_line_info()
4209 		info->xmit.buf = NULL;  in rs_init()
4210 		info->xmit.tail = info->xmit.head = 0;  in rs_init()