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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 09:54:18 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 17:29:47 +0200 |
| commit | 39c2e60f8c584c1b29b5c4375dd49df7995386bb (patch) | |
| tree | fcb7e742d38c6e4655660d89be01e61d58ceebc4 /drivers/char/tty_ioctl.c | |
| parent | isicom: fix buffer allocation (diff) | |
| download | linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.tar.xz linux-39c2e60f8c584c1b29b5c4375dd49df7995386bb.zip | |
tty: add throttle/unthrottle helpers
Something Arjan suggested which allows us to clean up the code nicely
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 c10d40c4c5ca..b1a757a5ee27 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 |