__tty_hangup      666 drivers/tty/tty_io.c 	__tty_hangup(tty, 0);
__tty_hangup      697 drivers/tty/tty_io.c 	__tty_hangup(tty, 0);
__tty_hangup      734 drivers/tty/tty_io.c 	__tty_hangup(tty, 1);