diff options
Diffstat (limited to 'drivers/char/tty_ioctl.c')
| -rw-r--r-- | drivers/char/tty_ioctl.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index c10d40c4c5c..b1a757a5ee2 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -67,6 +67,22 @@ void tty_driver_flush_buffer(struct tty_struct *tty) EXPORT_SYMBOL(tty_driver_flush_buffer); +void tty_throttle(struct tty_struct *tty) +{ + /* check TTY_THROTTLED first so it indicates our state */ + if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) && + tty->ops->throttle) + tty->ops->throttle(tty); +} +EXPORT_SYMBOL(tty_throttle); + +void tty_unthrottle(struct tty_struct *tty) +{ + if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) && + tty->ops->unthrottle) + tty->ops->unthrottle(tty); +} +EXPORT_SYMBOL(tty_unthrottle); /** * tty_wait_until_sent - wait for I/O to finish |