RD_IS_CTRL        267 dev/ramdisk.c  	if (RD_IS_CTRL(dev))
RD_IS_CTRL        462 dev/ramdisk.c  		if (RD_IS_CTRL(dev) == 0) {
RD_IS_CTRL        470 dev/ramdisk.c  		if (RD_IS_CTRL(dev) == 0) {