tag	line	file	source code
HUPCL	886	drivers/char/serial.c	if (info->tty && !(info->tty->termios->c_cflag & HUPCL))
HUPCL	1782	drivers/char/tty_io.c	tp->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
HUPCL	207	include/linux/tty.h	#define C_HUPCL(tty)  _C_FLAG((tty),HUPCL)