moving the fp regs

[Dick Dunn]

sef at kithrup.COM (Sean Eric Fagan) writes:
> cpcahil at virtech.uucp (Conor P. Cahill) writes:
> >This kind of change will require a recompile of every module that accesses
> >the user structure plus some additional changes ...
...
> Which happens to include just about every device driver, and *does* include
> things like NFS...
> ...I, personally, am interested to
> see if they are going to do it in a compatable manner...

C'mon, Sean, you're more imaginative than that!  You just leave a hole
where you move the FP regs out (leave a dummy of the structure there)
and adjust sizes where you put them in.  Check it carefully, and the
offsets to the stuff used by drivers can remain the same.

(I'm *not* the one doing the change.  This is just a general observation
based on what needs to happen.  The hard part is NOT the principle of
keeping essential parts of the u-area compatible; it's the many practical
matters involved in ensuring that you don't screw up something else in the
process.)
-- 
Dick Dunn     rcd at ico.isc.com -or- ico!rcd       Boulder, CO   (303)449-2870
   ...But is it art?