94 	size_t canon_head;  member
222 	size_t head = ldata->icanon ? ldata->canon_head : ldata->commit_head;  in chars_in_buffer()
249 	if (ldata->icanon && ldata->canon_head == ldata->read_tail)  in n_tty_check_throttle()
325 	ldata->read_head = ldata->canon_head = ldata->read_tail = 0;  in reset_buffer_flags()
961 	if (ldata->read_head == ldata->canon_head) {  in eraser()
971 			ldata->read_head = ldata->canon_head;  in eraser()
975 			ldata->read_head = ldata->canon_head;  in eraser()
987 	while (MASK(ldata->read_head) != MASK(ldata->canon_head)) {  in eraser()
995 			 MASK(head) != MASK(ldata->canon_head));  in eraser()
1037 				while (MASK(tail) != MASK(ldata->canon_head)) {  in eraser()
1067 	if (ldata->read_head == ldata->canon_head && L_ECHO(tty))  in eraser()
1269 	smp_store_release(&ldata->canon_head, ldata->read_head);  in n_tty_receive_handle_newline()
1301 		size_t tail = ldata->canon_head;  in n_tty_receive_char_canon()
1339 			if (ldata->canon_head == ldata->read_head)  in n_tty_receive_char_canon()
1402 			if (ldata->canon_head == ldata->read_head)  in n_tty_receive_char_special()
1439 		if (ldata->canon_head == ldata->read_head)  in n_tty_receive_char()
1730 			overflow = ldata->icanon && ldata->canon_head == tail;  in n_tty_receive_buf_common()
1813 			ldata->canon_head = ldata->read_tail;  in n_tty_set_termios()
1817 			ldata->canon_head = ldata->read_head;  in n_tty_set_termios()
1945 		return ldata->canon_head != ldata->read_tail;  in input_available_p()
2028 	size_t tail, canon_head;  in canon_copy_from_read_buf()  local
2035 	canon_head = smp_load_acquire(&ldata->canon_head);  in canon_copy_from_read_buf()
2036 	n = min(*nr, canon_head - ldata->read_tail);  in canon_copy_from_read_buf()
2082 	return ldata->read_tail != canon_head;  in canon_copy_from_read_buf()
2092 	size_t tail, canon_head;  in canon_skip_eof()  local
2094 	canon_head = smp_load_acquire(&ldata->canon_head);  in canon_skip_eof()
2098 	if (tail == canon_head)  in canon_skip_eof()
2493 	if (ldata->canon_head == ldata->read_tail)  in inq_canon()
2495 	head = ldata->canon_head;  in inq_canon()