linux-kernel - Re: [PATCH v2 09/13] pinctrl: meson: Rename REG_* to MREG

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Date:   Wed, 30 Mar 2022 17:22:56 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Qianggui Song <qianggui.song@...ogic.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        openbmc@...ts.ozlabs.org,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        linux-stm32@...md-mailman.stormreply.com,
        Linus Walleij <linus.walleij@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [PATCH v2 09/13] pinctrl: meson: Rename REG_* to MREG_*

On 30/03/2022 11:18, Andy Shevchenko wrote:
> On Wed, Mar 30, 2022 at 11:09:11AM +0200, Neil Armstrong wrote:
>> On 30/03/2022 10:54, Geert Uytterhoeven wrote:
>>> On Tue, Mar 29, 2022 at 6:47 PM Andy Shevchenko
>>> <andriy.shevchenko@...ux.intel.com> wrote:
>>>> On Tue, Mar 29, 2022 at 06:13:19PM +0200, Neil Armstrong wrote:
>>>>> On 29/03/2022 17:29, Andy Shevchenko wrote:
> 
> ...
> 
>>>>> What error do you hit ?
>>>>
>>>> arch/x86/include/asm/arch_hweight.h:9:17: error: expected identifier before string constant
>>>> 9 | #define REG_OUT "a"
>>>>     |                 ^~~
>>>
>>> Perhaps REG_{OUT,IN} in arch/x86/include/asm/arch_hweight.h should be
>>> renamed instead, as this is a generic header file that can be included
>>> anywhere, while the REG_{OUT,IN} definitions are only used locally,
>>> in the header file?
>>
>> Even better, those REG_OUT/REG_IN should be undefined at the end of the header since only
>> used in the headers inline functions:
>> ==============><==================================
>> diff --git a/arch/x86/include/asm/arch_hweight.h b/arch/x86/include/asm/arch_hweight.h
>> index ba88edd0d58b..139a4b0a2a14 100644
>> --- a/arch/x86/include/asm/arch_hweight.h
>> +++ b/arch/x86/include/asm/arch_hweight.h
>> @@ -52,4 +52,7 @@ static __always_inline unsigned long __arch_hweight64(__u64 w)
>>   }
>>   #endif /* CONFIG_X86_32 */
>>
>> +#undef REG_IN
>> +#undef REG_OUT
>> +
>>   #endif
>> ==============><==================================
> 
> Can you submit a formal patch, please?

I'll submit it separately

> 
> 
> And I think it would be good to have my patch as well, so we do not depend on
> the fate of the other one.
> 

Yes sure

Thanks,
Neil