}
static void tty_write_unlock(struct tty_struct *tty)
- __releases(&tty->atomic_write_lock)
{
mutex_unlock(&tty->atomic_write_lock);
wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
}
static int tty_write_lock(struct tty_struct *tty, int ndelay)
- __acquires(&tty->atomic_write_lock)
{
if (!mutex_trylock(&tty->atomic_write_lock)) {
if (ndelay)
return 0;
}
-struct tty_struct *tty_pair_get_tty(struct tty_struct *tty)
+/*
+ * if pty, return the slave side (real_tty)
+ * otherwise, return self
+ */
+static struct tty_struct *tty_pair_get_tty(struct tty_struct *tty)
{
if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
tty->driver->subtype == PTY_TYPE_MASTER)
tty = tty->link;
return tty;
}
-EXPORT_SYMBOL(tty_pair_get_tty);
-
-struct tty_struct *tty_pair_get_pty(struct tty_struct *tty)
-{
- if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
- tty->driver->subtype == PTY_TYPE_MASTER)
- return tty;
- return tty->link;
-}
-EXPORT_SYMBOL(tty_pair_get_pty);
/*
* Split this up, as gcc can choke on it otherwise..