OK, but the point was that 20 bits for a minor number is insufficient
for a fixed mapping of devices to minor numbers. It would be sufficient
if we wanted to continue to use dynamic mapping of minors to devices, of
course.
This is why I wanted this issue carefully discussed before we
actually do any coding. I know that lots of people don't like dynamic
mapping of minors to devices, and I don't yet have a feel as to whether
people will accept scsidev as a permenant solution or not.
A 64 bit dev_t presents it's own problems of course, but I just
wanted to make sure that we are not forgetting why this discussion got
started in the first place.
-Eric