161 static void tty_copy(const struct tty_struct *tty, void *to, size_t tail,  in tty_copy()  argument
165 	size_t size = N_TTY_BUF_SIZE - tail;  in tty_copy()
166 	void *from = read_buf_addr(ldata, tail);  in tty_copy()
560 static int n_tty_process_echo_ops(struct tty_struct *tty, size_t *tail,  in n_tty_process_echo_ops()  argument
570 	if (MASK(ldata->echo_commit) == MASK(*tail + 1))  in n_tty_process_echo_ops()
577 	op = echo_buf(ldata, *tail + 1);  in n_tty_process_echo_ops()
583 		if (MASK(ldata->echo_commit) == MASK(*tail + 2))  in n_tty_process_echo_ops()
586 		num_chars = echo_buf(ldata, *tail + 2);  in n_tty_process_echo_ops()
608 		*tail += 3;  in n_tty_process_echo_ops()
613 		*tail += 2;  in n_tty_process_echo_ops()
619 		*tail += 2;  in n_tty_process_echo_ops()
630 		*tail += 2;  in n_tty_process_echo_ops()
647 		*tail += 2;  in n_tty_process_echo_ops()
680 	size_t tail;  in __process_echoes()  local
685 	tail = ldata->echo_tail;  in __process_echoes()
686 	while (MASK(ldata->echo_commit) != MASK(tail)) {  in __process_echoes()
687 		c = echo_buf(ldata, tail);  in __process_echoes()
689 			int ret = n_tty_process_echo_ops(tty, &tail, space);  in __process_echoes()
707 			tail += 1;  in __process_echoes()
714 	while (ldata->echo_commit > tail &&  in __process_echoes()
715 	       ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) {  in __process_echoes()
716 		if (echo_buf(ldata, tail) == ECHO_OP_START) {  in __process_echoes()
717 			if (echo_buf(ldata, tail + 1) == ECHO_OP_ERASE_TAB)  in __process_echoes()
718 				tail += 3;  in __process_echoes()
720 				tail += 2;  in __process_echoes()
722 			tail++;  in __process_echoes()
726 	ldata->echo_tail = tail;  in __process_echoes()
1000 				size_t tail = ldata->read_head;  in eraser()  local
1009 				while (MASK(tail) != MASK(ldata->canon_head)) {  in eraser()
1010 					tail--;  in eraser()
1011 					c = read_buf(ldata, tail);  in eraser()
1272 		size_t tail = ldata->canon_head;  in n_tty_receive_char_canon()  local
1277 		while (MASK(tail) != MASK(ldata->read_head)) {  in n_tty_receive_char_canon()
1278 			echo_char(read_buf(ldata, tail), tty);  in n_tty_receive_char_canon()
1279 			tail++;  in n_tty_receive_char_canon()
1694 		size_t tail = smp_load_acquire(&ldata->read_tail);  in n_tty_receive_buf_common()  local
1696 		room = N_TTY_BUF_SIZE - (ldata->read_head - tail);  in n_tty_receive_buf_common()
1701 			overflow = ldata->icanon && ldata->canon_head == tail;  in n_tty_receive_buf_common()
1944 	size_t tail = MASK(ldata->read_tail);  in copy_from_read_buf()  local
1946 	n = min3(head - ldata->read_tail, N_TTY_BUF_SIZE - tail, *nr);  in copy_from_read_buf()
1950 	u8 *from = read_buf_addr(ldata, tail);  in copy_from_read_buf()
1997 	size_t tail, canon_head;  in canon_copy_from_read_buf()  local
2007 	tail = MASK(ldata->read_tail);  in canon_copy_from_read_buf()
2008 	size = min_t(size_t, tail + n, N_TTY_BUF_SIZE);  in canon_copy_from_read_buf()
2010 	eol = find_next_bit(ldata->read_flags, size, tail);  in canon_copy_from_read_buf()
2011 	more = n - (size - tail);  in canon_copy_from_read_buf()
2019 	n = eol - tail;  in canon_copy_from_read_buf()
2027 	tty_copy(tty, *kbp, tail, n);  in canon_copy_from_read_buf()
2055 	size_t tail, canon_head;  in canon_skip_eof()  local
2058 	tail = ldata->read_tail;  in canon_skip_eof()
2061 	if (tail == canon_head)  in canon_skip_eof()
2065 	tail &= (N_TTY_BUF_SIZE - 1);  in canon_skip_eof()
2066 	if (!test_bit(tail, ldata->read_flags))  in canon_skip_eof()
2068 	if (read_buf(ldata, tail) != __DISABLED_CHAR)  in canon_skip_eof()
2072 	clear_bit(tail, ldata->read_flags);  in canon_skip_eof()
2462 	size_t nr, head, tail;  in inq_canon()  local
2467 	tail = ldata->read_tail;  in inq_canon()
2468 	nr = head - tail;  in inq_canon()
2470 	while (MASK(head) != MASK(tail)) {  in inq_canon()
2471 		if (test_bit(MASK(tail), ldata->read_flags) &&  in inq_canon()
2472 		    read_buf(ldata, tail) == __DISABLED_CHAR)  in inq_canon()
2474 		tail++;  in inq_canon()