linux-kernel - Re: [PATCH] checkpatch: disable commit log length check warning for signature tag

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Message-ID: <20200727071159.GA595854@endurance>
Date:   Mon, 27 Jul 2020 12:41:59 +0530
From:   Nachiket Naganure <nachiketun8@...il.com>
To:     Joe Perches <joe@...ches.com>
Cc:     apw@...onical.com, lukas.bulwahn@...il.com,
        skhan@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] checkpatch: disable commit log length check warning for
 signature tag

On Sun, Jul 26, 2020 at 11:14:42PM -0700, Joe Perches wrote:
> On Mon, 2020-07-27 at 11:24 +0530, Nachiket Naganure wrote:
> > Disable commit log length check in case of signature tag. If the commit
> > log line has valid signature tags such as "Reported-and-tested-by" with
> > more than 75 characters, suppress the long length warning.
> > 
> > For instance in commit ac854131d984 ("USB: core: Fix misleading driver bug
> > report"), the corresponding patch contains a "Reported by" tag line which
> > exceeds 75 chars. And there is no valid way to shorten the length.
> > 
> > Signed-off-by: Nachiket Naganure <nachiketun8@...il.com>
> > ---
> >  scripts/checkpatch.pl | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > index 197436b20288..46237e9e0550 100755
> > --- a/scripts/checkpatch.pl
> > +++ b/scripts/checkpatch.pl
> > @@ -2806,6 +2806,8 @@ sub process {
> >  					# filename then :
> >  		      $line =~ /^\s*(?:Fixes:|Link:)/i ||
> >  					# A Fixes: or Link: line
> > +		      $line =~ /$signature_tags/ ||
> > +					# Check for signature_tags
> >  		      $commit_log_possible_stack_dump)) {
> >  			WARN("COMMIT_LOG_LONG_LINE",
> >  			     "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
> 
> OK, but the test should be:
> 
> 		      $line =~ /^\s*$signature_tags/ ||
> 
> so the line has to start with a signature and
> it won't match on signature tags in the middle
> of other content on the same line.
> 
> 
But the suggested won't work in case of merged signatures.
Such as "Reported-and-tested-by: user@...il.com"