linux-kernel - Re: [RESEND PATCH 0/4] Rework sparc32 page-table layout

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Date:   Thu, 14 May 2020 17:41:38 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     will@...nel.org
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        ndesaulniers@...gle.com, matt@...eblueprint.co.uk,
        sparclinux@...r.kernel.org, kernel-team@...roid.com,
        tglx@...utronix.de
Subject: Re: [RESEND PATCH 0/4] Rework sparc32 page-table layout

From: Will Deacon <will@...nel.org>
Date: Thu, 14 May 2020 08:26:24 +0100

> Hi David,
> 
> On Wed, May 13, 2020 at 03:32:26PM -0700, David Miller wrote:
>> From: Will Deacon <will@...nel.org>
>> Date: Tue, 14 Apr 2020 22:40:07 +0100
>> 
>> > This is a reposting of the patch series I sent previously to rework the
>> > sparc32 page-table layout so that 'pmd_t' can be used safely with
>> > READ_ONCE():
>> > 
>> > https://lore.kernel.org/lkml/20200324104005.11279-1-will@kernel.org
>> > 
>> > This is blocking the READ_ONCE() rework, which in turn allows us to
>> > bump the minimum GCC version for building the kernel up to 4.8.
>> 
>> Series applied to sparc-next, thanks Will.
> 
> Thanks, although this was picked up by -tip a couple of days ago [1] since
> the READ_ONCE() rework relies on it to avoid breaking the sparc32 build.
> 
> It's obviously harmless to go in both trees, but if you don't need it for
> anything then you may want to drop these to avoid duplicate commits in
> mainline.
 ...
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/log/?h=locking/kcsan

Thanks for the heads up but I'll leave it in the sparc-next tree for now.