linux-kernel - Re: [PATCH 08/17] ptrace/m68k: Stop open coding ptrace_report

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Date:   Wed, 12 Jan 2022 20:54:37 +1300
From:   Michael Schmitz <schmitzmic@...il.com>
To:     Finn Thain <fthain@...ux-m68k.org>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Linux API <linux-api@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH 08/17] ptrace/m68k: Stop open coding ptrace_report_syscall

Hi Finn,

Am 12.01.2022 um 16:32 schrieb Finn Thain:
> On Wed, 12 Jan 2022, Michael Schmitz wrote:
>
>>
>> I seem to recall we also tested those on your 040 and there was no
>> regression there, but I may be misremembering that.
>>
>
> I abandoned that regression testing exercise when unpatched mainline
> kernels began failing on that machine. I'm in the process of setting up a
> different 68040 machine.
>

Thanks for refreshing my memory!

Splitting my first patch as suggested by Al in order to defer handling 
of the syscall_trace_enter() return code would achieve what Geert 
suggested (eliminate m68k syscall_trace() altogether) without risk of 
regression. This would need to replace Eric's patch 8.

Do you want me to send such a version based on my old patch series, or 
would you rather prepare that yourself, Eric?

Cheers,

	Michael