Re: [PATCH V4 08/18] powerpc/mm: Copy pgalloc (part 1)

On Tue, Feb 23, 2016 at 10:18:10AM +0530, Aneesh Kumar K.V wrote:

This patch make a copy of pgalloc routines for book3s. The idea is to
enable a hash64 copy of these pgalloc routines which can be later
updated to have a radix conditional. Radix introduce a new page table
format with different page table size.

This mostly does:

cp pgalloc-32.h book3s/32/pgalloc.h
cp pgalloc-64.h book3s/64/pgalloc.h

What is the motivation for copying over the 32-bit header?

Regarding the 64-bit header, I don't see anything in it that will need
to be changed for radix other than making P{G,U,M}D_INDEX_SIZE be
variables rather than constants (and possibly have a lowercase name
instead of uppercase).  What other changes are you expecting to make?

Paul.