success 2.4.0-test8 with latest bk

[Troy Benjegerdes]

I got curious, and I tracked down the commented out
__clear_user(Hash, hash_size)

to version 1.10 of init.c

arch/ppc/mm/init.c
  1.10 00/02/04 13:20:23 cort at medea.fsmlabs.com +15 -2
  Changes to fix PPC64 MM (short term fix) and protect the system
  map memory from being written over.

Cort, any chance you happen to recall why that was needed

>
> On Thu, 14 Sep 2000, Paul Mackerras wrote:
>
> > Takashi Oe writes:
> >
> > > Could you try the following change for arch/ppc/mm/init.c?
> > [snip]
> > > 		Hash = mem_pieces_find(Hash_size, Hash_size);
> > > 		clear_hash_table();
> >
> > Huh?  There is a __clear_user(Hash, Hash_size) call in there but it's
> > commented out, which I don't understand at all.  Certainly the hash
> > table needs to be cleared.
>
> Yeah, that's what I thought when I first saw the code a few months ago.
>
> >                             Using cacheable_memzero would probably be
> > the fastest way to do it.
>
> __clear_user() works but I can't use cacheable_memzero() since frame
> buffer memory resides on the same memory block.
>
>
> Takashi Oe
>
>
>
>

--
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Troy Benjegerdes                'da hozer'                hozer at drgw.net


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