linux-kernel - Re: [PATCH] powerpc/8xx: use pmd_off() to access a PMD entry in pte

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Message-ID: <875zbpetbz.fsf@mpe.ellerman.id.au>
Date:   Wed, 17 Jun 2020 23:05:04 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Christophe Leroy <christophe.leroy@....fr>,
        linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...ux.ibm.com>
Subject: Re: [PATCH] powerpc/8xx: use pmd_off() to access a PMD entry in pte_update()

Mike Rapoport <rppt@...nel.org> writes:
> On Wed, Jun 17, 2020 at 09:21:42AM +1000, Michael Ellerman wrote:
>> Andrew Morton <akpm@...ux-foundation.org> writes:
>> > On Mon, 15 Jun 2020 12:22:29 +0300 Mike Rapoport <rppt@...nel.org> wrote:
>> >
>> >> From: Mike Rapoport <rppt@...ux.ibm.com>
>> >> 
>> >> The pte_update() implementation for PPC_8xx unfolds page table from the PGD
>> >> level to access a PMD entry. Since 8xx has only 2-level page table this can
>> >> be simplified with pmd_off() shortcut.
>> >> 
>> >> Replace explicit unfolding with pmd_off() and drop defines of pgd_index()
>> >> and pgd_offset() that are no longer needed.
>> >> 
>> >> Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
>> >> ---
>> >> 
>> >> I think it's powerpc material, but I won't mind if Andrew picks it up :)
>> >
>> > Via the powerpc tree would be better, please.
>> 
>> I'll take it into next for v5.9, unless there's a reason it needs to go
>> into v5.8.
>
> I consider it a fixup for 5.8 merge window conflicts. Besides, mering it
> now may avoid new conflicts in 5.9 ;-)

OK, I'll pick it up for v5.8.

cheers