tty_send_xchar    923 drivers/tty/tty_ioctl.c 				retval = tty_send_xchar(tty, STOP_CHAR(tty));
tty_send_xchar    927 drivers/tty/tty_ioctl.c 				retval = tty_send_xchar(tty, START_CHAR(tty));
tty_send_xchar    489 include/linux/tty.h extern int tty_send_xchar(struct tty_struct *tty, char ch);