[PATCH] powerpc/8xx: fix regression introduced by cache coherency rewrite

[Joakim Tjernlund]

Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote on 29/09/2009 10:16:38:
>
>
> > hmm, yes. You do get this and mysterious SEGV if you hit the but so does
> > other bugs too so this is probably due to missing invalidation.
> >
> > I suspect that something like below will fix the problem and
> > is the "correct" fix(untested, not even compiled):
>
> Ok but do we also still have to worry about the "unpopulated" TLB
> entries and invalidate them somehow when populating ?

No, this patch is to not populate the MMU with invalid entries at
all. Hopefully you can remove those invalidate 8xx TLBs hacks
you currently have.

     Jocke