diff options
Diffstat (limited to 'drivers/char/n_tty.c')
| -rw-r--r-- | drivers/char/n_tty.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index ccad7ae9454..ede365d0538 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -132,7 +132,7 @@ static void put_tty_queue(unsigned char c, struct tty_struct *tty) * We test the TTY_THROTTLED bit first so that it always * indicates the current state. The decision about whether * it is worth allowing more input has been taken by the caller. - * Can sleep, may be called under the atomic_read semaphore but + * Can sleep, may be called under the atomic_read_lock mutex but * this is not guaranteed. */ @@ -1132,7 +1132,7 @@ static inline int input_available_p(struct tty_struct *tty, int amt) * buffer, and once to drain the space from the (physical) beginning of * the buffer to head pointer. * - * Called under the tty->atomic_read sem and with TTY_DONT_FLIP set + * Called under the tty->atomic_read_lock sem and with TTY_DONT_FLIP set * */ @@ -1262,11 +1262,11 @@ do_it_again: * Internal serialization of reads. */ if (file->f_flags & O_NONBLOCK) { - if (down_trylock(&tty->atomic_read)) + if (!mutex_trylock(&tty->atomic_read_lock)) return -EAGAIN; } else { - if (down_interruptible(&tty->atomic_read)) + if (mutex_lock_interruptible(&tty->atomic_read_lock)) return -ERESTARTSYS; } @@ -1393,7 +1393,7 @@ do_it_again: timeout = time; } clear_bit(TTY_DONT_FLIP, &tty->flags); - up(&tty->atomic_read); + mutex_unlock(&tty->atomic_read_lock); remove_wait_queue(&tty->read_wait, &wait); if (!waitqueue_active(&tty->read_wait)) |