diff options
| -rw-r--r-- | drivers/tty/n_tty.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 7f8f6cfa8843..07b6a013b5ab 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -138,23 +138,23 @@ static inline size_t read_cnt(struct n_tty_data *ldata) static inline unsigned char read_buf(struct n_tty_data *ldata, size_t i) { - return ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; + return ldata->read_buf[MASK(i)]; } static inline unsigned char *read_buf_addr(struct n_tty_data *ldata, size_t i) { - return &ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; + return &ldata->read_buf[MASK(i)]; } static inline unsigned char echo_buf(struct n_tty_data *ldata, size_t i) { smp_rmb(); /* Matches smp_wmb() in add_echo_byte(). */ - return ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; + return ldata->echo_buf[MASK(i)]; } static inline unsigned char *echo_buf_addr(struct n_tty_data *ldata, size_t i) { - return &ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; + return &ldata->echo_buf[MASK(i)]; } /* If we are not echoing the data, perhaps this is a secret so erase it */ @@ -1359,7 +1359,7 @@ static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c, put_tty_queue(c, ldata); handle_newline: - set_bit(ldata->read_head & (N_TTY_BUF_SIZE - 1), ldata->read_flags); + set_bit(MASK(ldata->read_head), ldata->read_flags); put_tty_queue(c, ldata); smp_store_release(&ldata->canon_head, ldata->read_head); kill_fasync(&tty->fasync, SIGIO, POLL_IN); @@ -1505,14 +1505,14 @@ n_tty_receive_buf_real_raw(const struct tty_struct *tty, const u8 *cp, struct n_tty_data *ldata = tty->disc_data; size_t n, head; - head = ldata->read_head & (N_TTY_BUF_SIZE - 1); + head = MASK(ldata->read_head); n = min_t(size_t, count, N_TTY_BUF_SIZE - head); memcpy(read_buf_addr(ldata, head), cp, n); ldata->read_head += n; cp += n; count -= n; - head = ldata->read_head & (N_TTY_BUF_SIZE - 1); + head = MASK(ldata->read_head); n = min_t(size_t, count, N_TTY_BUF_SIZE - head); memcpy(read_buf_addr(ldata, head), cp, n); ldata->read_head += n; @@ -1779,8 +1779,7 @@ static void n_tty_set_termios(struct tty_struct *tty, const struct ktermios *old ldata->canon_head = ldata->read_tail; ldata->push = 0; } else { - set_bit((ldata->read_head - 1) & (N_TTY_BUF_SIZE - 1), - ldata->read_flags); + set_bit(MASK(ldata->read_head - 1), ldata->read_flags); ldata->canon_head = ldata->read_head; ldata->push = 1; } @@ -1941,7 +1940,7 @@ static bool copy_from_read_buf(const struct tty_struct *tty, size_t n; bool is_eof; size_t head = smp_load_acquire(&ldata->commit_head); - size_t tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); + size_t tail = MASK(ldata->read_tail); n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail); n = min(*nr, n); @@ -2004,7 +2003,7 @@ static bool canon_copy_from_read_buf(const struct tty_struct *tty, canon_head = smp_load_acquire(&ldata->canon_head); n = min(*nr, canon_head - ldata->read_tail); - tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); + tail = MASK(ldata->read_tail); size = min_t(size_t, tail + n, N_TTY_BUF_SIZE); n_tty_trace("%s: nr:%zu tail:%zu n:%zu size:%zu\n", @@ -2466,7 +2465,7 @@ static unsigned long inq_canon(struct n_tty_data *ldata) nr = head - tail; /* Skip EOF-chars.. */ while (MASK(head) != MASK(tail)) { - if (test_bit(tail & (N_TTY_BUF_SIZE - 1), ldata->read_flags) && + if (test_bit(MASK(tail), ldata->read_flags) && read_buf(ldata, tail) == __DISABLED_CHAR) nr--; tail++; |