linux-kernel - Re: [PATCH v2] checkpatch: validate MODULE

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Date:	Tue, 07 Apr 2015 12:48:03 -0700
From:	Joe Perches <joe@...ches.com>
To:	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] checkpatch: validate MODULE_LICENSE content

On Tue, 2015-04-07 at 12:37 -0700, Bjorn Andersson wrote:
> There is a well defined list of expected values for MODULE_LICENSE so
> warn the user upon usage of unknown values.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
> ---
> 
> Thanks for the review Joe!

No charge.

> "Proprietary" is in the list because this is the full list of "valid" values
> mentioned in include/linux/module.h. So it's the list of licenses valid for
> submission, but rather the list of valid values.

So the "Proprietary" entry is only for non kernel-tree uses.
I wonder if the kernel checkpatch script should account for that.

I've no strong opinion though if Andrew wants to accept this as-is.

cheers, Joe

> Changes since v1:
> - Fixed nits pointed out by Joe
> - Added comment to clarify the purpose, as well as origin of the values
> 
>  scripts/checkpatch.pl | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 9a8b2bd..ca10d79 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -5431,6 +5431,24 @@ sub process {
>  				}
>  			}
>  		}
> +
> +# validate content of MODULE_LICENSE against list from include/linux/module.h
> +		if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
> +			my $extracted_string = get_quoted_string($line, $rawline);
> +			my $valid_licenses = qr{
> +						GPL|
> +						GPL\ v2|
> +						GPL\ and\ additional\ rights|
> +						Dual\ BSD/GPL|
> +						Dual\ MIT/GPL|
> +						Dual\ MPL/GPL|
> +						Proprietary
> +					}x;
> +			if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
> +				WARN("MODULE_LICENSE",
> +				     "unknown module license " . $extracted_string . "\n" . $herecurr);
> +			}
> +		}
>  	}
>  
>  	# If we have no input at all, then there is nothing to report on



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