vt_in_use 59 drivers/tty/vt/vt_ioctl.c if (vt_in_use(i)) vt_in_use 659 drivers/tty/vt/vt_ioctl.c if (vt_in_use(i)) vt_in_use 673 drivers/tty/vt/vt_ioctl.c if (!vt_in_use(i))