[PATCH] powerpc: rework 4xx PTE access and TLB miss

[Josh Boyer]

On Tue, 08 Jul 2008 15:54:40 +1000
Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:

> This is some preliminary work to improve TLB management on SW loaded
> TLB powerpc platforms. This introduce support for non-atomic PTE
> operations in pgtable-ppc32.h and removes write back to the PTE from
> the TLB miss handlers. In addition, the DSI interrupt code no longer
> tries to fixup write permission, this is left to generic code, and
> _PAGE_HWWRITE is gone.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

Boots for me now.  So far it's surviving a dbench run, and I'll try
hackbench/kernbench shortly.

I've got this queued up in my -next branch.

josh