tty_jobctrl_ioctl 2652 drivers/tty/tty_io.c 		retval = tty_jobctrl_ioctl(tty, real_tty, file, cmd, arg);
tty_jobctrl_ioctl  556 include/linux/tty.h extern long tty_jobctrl_ioctl(struct tty_struct *tty, struct tty_struct *real_tty,