Re: 2.6.10-rc1-mm3

[Andi Kleen]

> "first" needs to be able to handle being set to virtual address 0x8000
> since, for some CPUs, it is absolutely vital that we keep the first
> _page_ of memory mapped, but user executables are loaded at 0x8000.
> 
> Note that the PGD increment is 2MB on ARM.

I think I handled the ARM hac^wcase correctly, but I wasn't able to test it
(hint hint). Even with Ingo's changes it would still work because
of the guarding ifs. 

-Andi

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