126 #define MASK(x) ((x) & (N_TTY_BUF_SIZE - 1))  macro
135 	return ldata->read_buf[MASK(i)];  in read_buf()
140 	return &ldata->read_buf[MASK(i)];  in read_buf_addr()
146 	return ldata->echo_buf[MASK(i)];  in echo_buf()
151 	return &ldata->echo_buf[MASK(i)];  in echo_buf_addr()
570 	if (MASK(ldata->echo_commit) == MASK(*tail + 1))  in n_tty_process_echo_ops()
583 		if (MASK(ldata->echo_commit) == MASK(*tail + 2))  in n_tty_process_echo_ops()
686 	while (MASK(ldata->echo_commit) != MASK(tail)) {  in __process_echoes()
959 	while (MASK(ldata->read_head) != MASK(ldata->canon_head)) {  in eraser()
967 			 MASK(head) != MASK(ldata->canon_head));  in eraser()
1009 				while (MASK(tail) != MASK(ldata->canon_head)) {  in eraser()
1238 	set_bit(MASK(ldata->read_head), ldata->read_flags);  in n_tty_receive_handle_newline()
1277 		while (MASK(tail) != MASK(ldata->read_head)) {  in n_tty_receive_char_canon()
1505 		size_t head = MASK(ldata->read_head);  in n_tty_receive_buf_real_raw()
1785 			set_bit(MASK(ldata->read_head - 1), ldata->read_flags);  in n_tty_set_termios()
1944 	size_t tail = MASK(ldata->read_tail);  in copy_from_read_buf()
2007 	tail = MASK(ldata->read_tail);  in canon_copy_from_read_buf()
2470 	while (MASK(head) != MASK(tail)) {  in inq_canon()
2471 		if (test_bit(MASK(tail), ldata->read_flags) &&  in inq_canon()