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

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Message-ID: <CAK8P3a0Jiza_0=31hrj439nJSG23W9EytgxQf12KxT_6dWL9WQ@mail.gmail.com>
Date:   Fri, 15 Jan 2021 12:47:50 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Linus Walleij <linus.walleij@...aro.org>, od@...c.me,
        GPIO SUBSYSTEM <linux-gpio@...r.kernel.org>,
        "linux-kernel@...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

On Mon, Jan 11, 2021 at 9:45 AM Paul Cercueil <paul@...pouillou.net> wrote:
>
> 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.

Looks great! Thanks a lot for getting this sorted.

> > 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.

Yes, please do.

Acked-by: Arnd Bergmann <arnd@...db.de>