linux-kernel - Re: [PATCH] misc: remove redundant 'default n' from Kconfig-s

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Message-ID: <CAK8P3a0wky-Km=PQO9=jN2kC0Zyy75LfD-1Kn5YHiEEV8ymZHQ@mail.gmail.com>
Date:   Wed, 22 May 2019 23:20:00 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Eric Piel <eric.piel@...mplin-utc.net>,
        Frank Haverkamp <haver@...ux.ibm.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH] misc: remove redundant 'default n' from Kconfig-s

On Mon, May 20, 2019 at 4:10 PM Bartlomiej Zolnierkiewicz
<b.zolnierkie@...sung.com> wrote:
>
> 'default n' is the default value for any bool or tristate Kconfig
> setting so there is no need to write it explicitly.
>
> Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
> is not set' for visible symbols") the Kconfig behavior is the same
> regardless of 'default n' being present or not:
>
>     ...
>     One side effect of (and the main motivation for) this change is making
>     the following two definitions behave exactly the same:
>
>         config FOO
>                 bool
>
>         config FOO
>                 bool
>                 default n
>
>     With this change, neither of these will generate a
>     '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
>     That might make it clearer to people that a bare 'default n' is
>     redundant.
>     ...
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>

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