On Mon, 9 Apr 2018, Christoph Hellwig wrote:

> > -#ifdef __HAVE_ARCH_PTE_SPECIAL
> > +#ifdef CONFIG_ARCH_HAS_PTE_SPECIAL
> >  # define HAVE_PTE_SPECIAL 1
> >  #else
> >  # define HAVE_PTE_SPECIAL 0
> 
> I'd say kill this odd indirection and just use the
> CONFIG_ARCH_HAS_PTE_SPECIAL symbol directly.
> 
> 

Agree, and I think it would be easier to audit/review if patches 1 and 3 
were folded together to see the relationship between the newly added 
selects and what #define's it is replacing.  Otherwise, looks good!

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