diff options
Diffstat (limited to 'sys/kern/tty.c')
| -rw-r--r-- | sys/kern/tty.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sys/kern/tty.c b/sys/kern/tty.c index 8efe14b..9802f10 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)tty.c 8.8 (Berkeley) 1/21/94 - * $Id: tty.c,v 1.54 1995/07/21 20:52:38 bde Exp $ + * $Id: tty.c,v 1.55 1995/07/21 22:51:50 bde Exp $ */ /*- @@ -2054,6 +2054,23 @@ ttwakeup(tp) } /* + * Wake up any writers on a tty. + */ +void +ttwwakeup(tp) + register struct tty *tp; +{ + + if (tp->t_outq.c_cc <= tp->t_lowat) { + if (tp->t_state & TS_ASLEEP) { + tp->t_state &= ~TS_ASLEEP; + wakeup(&tp->t_outq); + } + selwakeup(&tp->t_wsel); + } +} + +/* * Look up a code for a specified speed in a conversion table; * used by drivers to map software speed values to hardware parameters. */ |
