Re: [PATCH, RESEND] asm-generic, mm: pgtable: consolidate zero page helpers

On Fri, 7 Dec 2012, Kirill A. Shutemov wrote:

From: "Kirill A. Shutemov" <redacted>

We have two different implementation of is_zero_pfn() and
my_zero_pfn() helpers: for architectures with and without zero page
coloring.

Let's consolidate them in <asm-generic/pgtable.h>.

What's the benefit from doing this other than generalizing some per-arch 
code?  It simply adds on more layer of redirection to try to find the 
implementation that matters for the architecture you're hacking on.