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

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Message-ID: <b7929981-5818-32d6-4a27-c9701c977d39@suse.com>
Date:   Wed, 17 Oct 2018 10:58:07 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xen: remove redundant 'default n' from Kconfig

On 16/10/2018 16:33, Bartlomiej Zolnierkiewicz 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>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen