linux-kernel - Re: [PATCH v1 1/3] kernel.h: Don't pollute header with single user macros

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Message-ID: <CAHp75VdtyeTakC4UgScCD2=yksF6RhwrNVfmuzGUcyaZ6UKtFQ@mail.gmail.com>
Date:   Tue, 13 Jul 2021 15:42:59 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Thomas Graf <tgraf@...g.ch>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: [PATCH v1 1/3] kernel.h: Don't pollute header with single user macros

On Tue, Jul 13, 2021 at 3:41 PM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Tue, Jul 13, 2021 at 11:45:39AM +0300, Andy Shevchenko wrote:
> > The COUNT_ARGS() and CONCATENATE() macros are used by a single user.
> > Let move them to it.
>
> That seems to be because people like re-implementing it instead of
> reusing existing ones:
>
> arch/x86/include/asm/efi.h:#define __efi_nargs__(_0, _1, _2, _3, _4, _5, _6, _7, n, ...)        \
> arch/x86/include/asm/rmwcc.h:#define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
> include/linux/arm-smccc.h:#define ___count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x
> include/linux/kernel.h:#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n

Good catch!

I will redo this, thanks!

-- 
With Best Regards,
Andy Shevchenko