linux-kernel - Re: [PATCH 002/193] checkpatch: warn about using CONFIG

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Message-ID: <20121023225919.GB3179@localhost>
Date:	Tue, 23 Oct 2012 23:59:19 +0100
From:	Andy Whitcroft <apw@...onical.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 002/193] checkpatch: warn about using CONFIG_EXPERIMENTAL

On Tue, Oct 23, 2012 at 01:01:15PM -0700, Kees Cook wrote:
> This config item has not carried much meaning for a while now and is
> almost always enabled by default. As agreed during the Linux kernel
> summit, it is being removed.  This will discourage future addition of
> CONFIG_EXPERIMENTAL while it is being phased out.
> 
> Cc: Andy Whitcroft <apw@...onical.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  scripts/checkpatch.pl |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 21a9f5d..37dc932 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -1757,6 +1757,13 @@ sub process {
>  			#print "is_start<$is_start> is_end<$is_end> length<$length>\n";
>  		}
>  
> +# Discourage the addition of CONFIG_EXPERIMENTAL in Kconfig.
> +		if ($realfile =~ /Kconfig/ &&
> +		    $line =~ /.\s*depends on\s+.*\bEXPERIMENTAL\b/) {
> +			WARN("CONFIG_EXPERIMENTAL",
> +			     "Use of CONFIG_EXPERIMENTAL is deprecated.\n");
> +		}
> +

Seem reasonable.  Should you suggest how they can mark things
experimental?  I assume (EXPERIMENTAL) in the title is now the right
way?

>  		if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
>  		    ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
>  			my $flag = $1;

-apw
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