linux-kernel - Re: [PATCH 2/3] asm-generic, x86: wrap atomic operations

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Date:   Fri, 24 Mar 2017 13:46:00 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "x86@...nel.org" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 2/3] asm-generic, x86: wrap atomic operations

On Fri, Mar 24, 2017 at 11:57 AM, Ingo Molnar <mingo@...nel.org> wrote:
>
> * Dmitry Vyukov <dvyukov@...gle.com> wrote:
>
>> > Are just utterly disgusting that turn perfectly readable code into an
>> > unreadable, unmaintainable mess.
>> >
>> > You need to find some better, cleaner solution please, or convince me that no
>> > such solution is possible. NAK for the time being.
>>
>> Well, I can just write all functions as is. Does it better confirm to kernel
>> style?
>
> I think writing the prototypes out as-is, properly organized, beats any of these
> macro based solutions.

You mean write out the prototypes, but use what for definitions? Macros again?

>> [...] I've just looked at the x86 atomic.h and it uses macros for similar
>> purpose (ATOMIC_OP/ATOMIC_FETCH_OP), so I thought that must be idiomatic kernel
>> style...
>
> Mind fixing those too while at it?

I don't mind once I understand how exactly you want it to look.

> And please squash any bug fixes and re-send a clean series against latest upstream
> or so.
>
> Thanks,
>
>         Ingo