For disks both the SCSI_IOCTL_GET_IDLUN and
SCSI_IOCTL_GET_BUS_NUMBER ioctls return the value
0 (type: int) in all cases. The attachment removes
the dummy definitions of these ioctls in
driver/block/scsi_ioctl.c so they fall through
to the scsi mid level which correctly implements
them (at least in terms of lk 2.4).

Doug Gilbert