Beispiel #1
0
void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty)
{
	/*
	 * Prevent flush_to_ldisc() from rescheduling the work for later.  Then
	 * kill any delayed work. As this is the final close it does not
	 * race with the set_ldisc code path.
	 */

	tty_lock_pair(tty, o_tty);
	tty_ldisc_halt(tty);
	tty_ldisc_flush_works(tty);
	if (o_tty) {
		tty_ldisc_halt(o_tty);
		tty_ldisc_flush_works(o_tty);
	}

	/* This will need doing differently if we need to lock */
	tty_ldisc_kill(tty);

	if (o_tty)
		tty_ldisc_kill(o_tty);

	tty_unlock_pair(tty, o_tty);
	/* And the memory resources remaining (buffers, termios) will be
	   disposed of when the kref hits zero */
}
void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty)
{
	/*
	 * Shutdown this line discipline. As this is the final close,
	 * it does not race with the set_ldisc code path.
	 */

	tty_ldisc_debug(tty, "closing ldisc: %p\n", tty->ldisc);

	tty_ldisc_lock_pair(tty, o_tty);
	tty_lock_pair(tty, o_tty);

	tty_ldisc_kill(tty);
	if (o_tty)
		tty_ldisc_kill(o_tty);

	tty_unlock_pair(tty, o_tty);
	tty_ldisc_unlock_pair(tty, o_tty);

	/* And the memory resources remaining (buffers, termios) will be
	   disposed of when the kref hits zero */

	tty_ldisc_debug(tty, "ldisc closed\n");
}