linux-kernel - Re: [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

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Date:   Thu, 8 Jun 2017 16:28:56 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Yury Norov <ynorov@...iumnetworks.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-doc@...r.kernel.org,
        Andrew Pinski <Andrew.Pinski@...iumnetworks.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>, szabolcs.nagy@....com,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Adam Borowski <kilobyte@...band.pl>,
        manuel.montezelo@...il.com, Chris Metcalf <cmetcalf@...lanox.com>,
        Andrew Pinski <pinskia@...il.com>, linyongting@...wei.com,
        klimov.linux@...il.com, Mark Brown <broonie@...nel.org>,
        Bamvor Zhangjian <bamvor.zhangjian@...wei.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Florian Weimer <fweimer@...hat.com>, Nathan_Lynch@...tor.com,
        Ramana Radhakrishnan <ramana.gcc@...glemail.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        David Miller <davem@...emloft.net>,
        christoph.muellner@...obroma-systems.com
Subject: Re: [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

On Thu, Jun 8, 2017 at 4:10 PM, Catalin Marinas <catalin.marinas@....com> wrote:
> On Sun, Jun 04, 2017 at 03:00:02PM +0300, Yury Norov wrote:
>> off_t is  passed in register pair just like in aarch32.
>> In this patch corresponding aarch32 handlers are shared to
>> ilp32 code.
>
> Is the comment here relevant? IOW, do we have any AArch64/ILP32 syscall
> where off_t is used as an argument? AFAICT, the *64 syscalls use loff_t
> or loff_t *.

I think it should just be reworded, the 'off_t' above seems to refer to the
user space type that corresponds to the kernel's loff_t.

       Arnd