linux-kernel - Re: [PATCH] checkpatch: Make extern in .h prototypes quieter.

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Date:	Mon, 2 Sep 2013 22:51:00 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Joe Perches <joe@...ches.com>
Cc:	David Howells <dhowells@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	hannes@...essinduktion.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] checkpatch: Make extern in .h prototypes quieter.

On Mon, Sep 2, 2013 at 6:21 PM, Joe Perches <joe@...ches.com> wrote:
> The use of extern in .h files is a bit contentious.
>
> Make it emitted only when --strict is used on the
> command-line.

IIRC, the original intention was to always use "extern" in external function or
data declarations, and then complain if any "extern" keyword was found
in *.c files. Always using the "extern" keyword makes it easier to flag those.

> -                       if (WARN("AVOID_EXTERNS",
> -                                "extern prototypes should be avoided in .h files\n" . $herecurr) &&
> +                       if (CHK("AVOID_EXTERNS",
> +                               "extern prototypes should be avoided in .h files\n" . $herecurr) &&

I know it's not the subject of this patch, but shouldn't "extern prototypes"
be "extern keywords"?

>                             $fix) {
>                                 $fixed[$linenr - 1] =~ s/(.*)\bextern\s+(.*)/$1$2/;
>                         }

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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