Re: [CFT] MM: Pass a PTE pointer to update_mmu_cache() rather thanthe PTE itself

[Benjamin Herrenschmidt]

On Wed, 2010-01-20 at 13:52 +0000, Russell King wrote:
> On VIVT ARM, when we have multiple shared mappings of the same file
> in the same MM, we need to ensure that we have coherency across all
> copies.  We do this via make_coherent() by making the pages
> uncacheable.
> 
> This used to work fine, until we allowed highmem with highpte - we
> now have a page table which is mapped as required, and is not available
> for modification via update_mmu_cache().

Looks good. I'll test when I'm back from LCA.

Cheers,
Ben.


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