Support for 64bit userspace.

[M. Warner Losh]

In message: <AANLkTinwi7v3wANCd5EGA9GHuWUrnAEP3Rq6EedGpGKe at mail.gmail.com>
            Juli Mallett <jmallett at FreeBSD.org> writes:
: On Thu, Jul 29, 2010 at 01:15, Jayachandran C. <c.jayachandran at gmail.com> wrote:
: > I kept the 32 bit pmap.c code untouched so that I don't have to deal with
: > the breakage there during the early 64bit changes.
: > I will check in the other changes now, and will do another round of work on
: > pmap.c/pmap64.c to see if it can be merged (and eliminate the config
: > option).
: 
: Hmm, hopefully the changes will be well-isolated and any abstractions
: will be right for 32-bit and 64-bit both.  One of the problems with
: two files is that when they are merged, which it sounds like you think
: is inevitable, we lose the change history for that file.  And if
: they're in the same file, you don't need an option, just __mips_n64.

I'd prefer one file as well...

Warner