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Date:   Sat, 23 Mar 2019 13:01:03 +1100
From:   "Tobin C. Harding" <me@...in.cc>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Jonathan Corbet <corbet@....net>,
        Andy Whitcroft <apw@...onical.com>,
        Joe Perches <joe@...ches.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Niklas Cassel <niklas.cassel@...aro.org>
Subject: Re: [PATCH v5 2/2] checkpatch: Warn on improper usage of
 Co-developed-by

On Fri, Mar 22, 2019 at 02:11:37PM -0700, Sean Christopherson wrote:
> The purpose of Co-developed-by: is to give attribution to authors who
> aren't already attributed by the From: tag, i.e. who aren't the nominal
> patch author.  Because Co-developed-by: is essentially a variation of
> From:, it must be accompanied by a Signed-off-by: of the associated
> co-author.  To ease the burden of determining whether or not co-authors
> have signed off, Co-developed-by and Signed-off-by: must be explicitly
> paired, i.e. on consecutive lines for a given co-author.
> 
> Suggested-by: Joe Perches <joe@...ches.com>
> Cc: Tobin C. Harding <me@...in.cc>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Jani Nikula <jani.nikula@...ux.intel.com>
> Cc: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
> Cc: Jonathan Cameron <jic23@...nel.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Niklas Cassel <niklas.cassel@...aro.org>
> Cc: Jonathan Corbet <corbet@....net>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> ---
>  scripts/checkpatch.pl | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 5b756278df13..bbe71f017f6d 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -2687,6 +2687,24 @@ sub process {
>  			} else {
>  				$signatures{$sig_nospace} = 1;
>  			}
> +
> +# Check Co-developed-by: immediately followed by Signed-off-by: with same name and email
> +			if ($sign_off =~ /^co-developed-by:$/i) {
> +				if ($email eq $author) {
> +					WARN("BAD_SIGN_OFF",
> +					      "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline);
> +				}
> +				if (!defined $lines[$linenr]) {
> +					WARN("BAD_SIGN_OFF",
> +                                             "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline);
> +				} elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) {
> +					WARN("BAD_SIGN_OFF",
> +					     "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
> +				} elsif ($1 ne $email) {
> +					WARN("BAD_SIGN_OFF",
> +					     "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
> +				}
> +			}
>  		}
>  
>  # Check email subject for common tools that don't need to be mentioned
> -- 
> 2.21.0
> 


Works as advertised!

thanks,
Tobin.

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