linux-kernel - Re: [PATCH v8 00/20] ILP32 for ARM64

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Message-ID: <20170731123718.7ajkxpjgcuvr7jep@yury-thinkpad>
Date:   Mon, 31 Jul 2017 15:37:18 +0300
From:   Yury Norov <ynorov@...iumnetworks.com>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     linux-doc@...r.kernel.org, szabolcs.nagy@....com,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Chris Metcalf <cmetcalf@...hip.com>,
        philipp.tomsich@...obroma-systems.com,
        Joseph Myers <joseph@...esourcery.com>,
        zhouchengming1@...wei.com,
        Steve Ellcey <sellcey@...iumnetworks.com>,
        Prasun.Kapoor@...iumnetworks.com, Andreas Schwab <schwab@...e.de>,
        Alexander Graf <agraf@...e.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Marcus Shawcroft <Marcus.Shawcroft@....com>,
        Adam Borowski <kilobyte@...band.pl>,
        manuel.montezelo@...il.com, James Hogan <james.hogan@...tec.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Pinski <pinskia@...il.com>,
        Will Deacon <will.deacon@....com>, linyongting@...wei.com,
        Alexey Klimov <klimov.linux@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Bamvor Zhangjian <bamvor.zhangjian@...wei.com>,
        linux-arm-kernel@...ts.infradead.org,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Florian Weimer <fweimer@...hat.com>, Nathan_Lynch@...tor.com,
        linux-kernel@...r.kernel.org, James Morse <james.morse@....com>,
        Adhemerval Zanella <adhemerval.zanella@...aro.org>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
        schwidefsky@...ibm.com, davem@...emloft.net,
        christoph.muellner@...obroma-systems.com
Subject: Re: [PATCH v8 00/20] ILP32 for ARM64

Hi Catalin,

On Thu, Jul 27, 2017 at 06:12:22PM +0100, Catalin Marinas wrote:
> Hi Yury,
> 
> On Mon, Jul 24, 2017 at 02:26:24PM +0300, Yury Norov wrote:

[...]

> > This is the 4.12 and linux-next - based kernel patches:
> > https://github.com/norov/linux/tree/ilp32-4.12
> > https://github.com/norov/linux/tree/ilp32-20170724
> 
> Thanks. I'll publish the 4.12-based branch sometime next week.
> 
> At this stage I don't see much value in a linux-next based ILP32. I
> would rather like to see a 4.13-rc3 based one, in preparation for a 4.13
> branch once released.
> 
> > Should I resend kernel patches to LKML, or links above are enough for
> > you?
> 
> The 4.12 link is ok. However, could you please post a 4.13-rcX based
> series, maybe split in two so that a few generic patches can be merged
> in 4.14?

This is the 4.13-rc3 - based branch:
https://github.com/norov/linux/tree/ilp32-4.13-rc3

Patches prior to 52315bc30f4967 ("arm64: ilp32: add documentation on
the ILP32 ABI for ARM64") are looking like generic. 

Note that this series includes the patch "ptrace: Add compat
PTRACE_{G,S}ETSIGMASK handlers":
https://patchwork.kernel.org/patch/9817343/

It is still under discussion in maillist. If it will be rejected, we'd
rework arm64 ptrace accordingly. 

> Given the reworking of the sigcontext code in 4.13, it would be
> good to review the ILP32 changes in this area again.

Thanks, I forgot to mention it in previous email. Changes are mostly located in
patches d87e8ed73d59 ("arm64: signal: share lp64 signal structures and routines
to ilp32") and 99c30e5df3f4 ("arm64: ilp32: introduce ilp32-specific handlers
for sigframe and ucontext"). All reviews are appreciated.

Yury