87     read_tail: usize,  field
137             read_tail: 0,  in new()
161         self.read_head - self.read_tail  in read_cnt()
186             let tail = self.read_tail;  in receive_buf_common()
808             self.read_tail = 0;  in input_signal()
964         if self.read_tail == self.canon_head {  in canon_skip_eof()
968         let tail = self.read_tail & (NTTY_BUFSIZE - 1);  in canon_skip_eof()
983         self.read_tail += 1;  in canon_skip_eof()
1010         let mut n = (*nr).min(canon_head - self.read_tail);  in canon_copy_from_read_buf()
1013         let tail = self.read_tail & (NTTY_BUFSIZE - 1);  in canon_copy_from_read_buf()
1073         self.read_tail += count;  in canon_copy_from_read_buf()
1077                 self.line_start = self.read_tail;  in canon_copy_from_read_buf()
1087         Ok(self.read_tail != canon_head)  in canon_copy_from_read_buf()
1104             return self.canon_head != self.read_tail;  in input_available()
1106             return (self.commit_head - self.read_tail) >= amt;  in input_available()
1128         let tail = self.read_tail & (NTTY_BUFSIZE - 1);  in copy_from_read_buf()
1131         let mut n = (NTTY_BUFSIZE - tail).min(head - self.read_tail);  in copy_from_read_buf()
1138             self.read_tail += n;  in copy_from_read_buf()
1147                 && head == self.read_tail  in copy_from_read_buf()
1155             return Ok(head != self.read_tail);  in copy_from_read_buf()
1560         ldata.read_tail = 0;  in flush_buffer()
1642         let tail = ldata.read_tail;  in read()
1735         if tail != ldata.read_tail {  in read()
1861                     if ldata.canon_head == ldata.read_tail {  in ioctl()
1865                         let mut tail = ldata.read_tail;  in ioctl()
1921             ldata.line_start = ldata.read_tail;  in set_termios()
1925                 ldata.canon_head = ldata.read_tail;  in set_termios()