linux-kernel - Re: [PATCH v2 1/2] kconfig.h: Add IF

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Date:   Mon, 11 Jan 2021 08:45:23 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     od@...c.me, GPIO SUBSYSTEM <linux-gpio@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Zhou Yanjie <zhouyanjie@...yeetech.com>
Subject: Re: [PATCH v2 1/2] kconfig.h: Add IF_ENABLED() macro

Hi,

Le lun. 14 déc. 2020 à 10:05, Linus Walleij 
<linus.walleij@...aro.org> a écrit :
> On Mon, Dec 14, 2020 at 12:54 AM Paul Cercueil <paul@...pouillou.net> 
> wrote:
> 
>>  IF_ENABLED(CONFIG_FOO, ptr) evaluates to (ptr) if CONFIG_FOO is set 
>> to 'y'
>>  or 'm', NULL otherwise. The (ptr) argument must be a pointer.
>> 
>>  The IF_ENABLED() macro can be very useful to help GCC drop dead 
>> code.
> 
> I can apply this with the other patch to the pinctrl subsystem if 
> Arnd or
> someone else who is good at KConfig provides an ACK.

Arnd? Any feedback?

Cheers,
-Paul