tag	line	file	source code
hangup	2487	drivers/char/cyclades.c	cy_serial_driver.hangup = cy_hangup;
hangup	2438	drivers/char/serial.c	serial_driver.hangup = rs_hangup;
hangup	403	drivers/char/tty_io.c	if (tty->driver.hangup)
hangup	404	drivers/char/tty_io.c	(tty->driver.hangup)(tty);
hangup	139	include/linux/tty_driver.h	void (*hangup)(struct tty_struct *tty);