linux-kernel - Re: [PATCH RFC] checkpatch: add new cases to commit handling

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Date:   Fri, 13 Nov 2020 19:47:35 +0530
From:   Dwaipayan Ray <dwaipayanray1@...il.com>
To:     Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     Joe Perches <joe@...ches.com>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC] checkpatch: add new cases to commit handling

On Fri, Nov 13, 2020 at 7:31 PM Lukas Bulwahn <lukas.bulwahn@...il.com> wrote:
>
> On Fri, Nov 13, 2020 at 2:37 PM Lukas Bulwahn <lukas.bulwahn@...il.com> wrote:
> >
> > On Fri, Nov 13, 2020 at 1:31 PM Dwaipayan Ray <dwaipayanray1@...il.com> wrote:
> > >
> > > Commit extraction in checkpatch fails in some cases.
> > > One of the most common false positives is a split line
> > > between "commit" and the git SHA of the commit.
> > >
> > > Improve commit handling to reduce false positives.
> > >
> > > Improvements:
> > > - handle split line between commit and git SHA of commit.
> > > - fix handling of split commit description.
> > >
> > > A quick evaluation of 50k commits from v5.4 showed that
> > > the GIT_COMMIT_ID errors dropped from 1032 to 897. Most
> > > of these were split lines between commit and its hash.
> > >
> >
> > Can you send me the file of the evaluation, e.g., all contexts (two
> > lines above and two lines below) around the warned line in the commits
> > where the GIT_COMMIT_ID dropped?
> >
> > Then, I can do a quick sanity check as well.
> >
>
> Thanks, Dwaipayan; I checked your file sent off-list and it looks good
> to not report on those cases.
>
> Maybe we can now check the remaining 900 cases once again; are they
> all true positives or is there still a big false positive class?
>
> Lukas

Hi,
I had roughly gone through the list and most of them are true positives.
But there are two particular cases which may be false:

1) References: tag. (I don't know if it is a proper convention).
There were about 50 of these:

References: 22b7a426bbe1 ("drm/i915/execlists: Preempt-to-busy")

But it is non uniform. Some commits use this tag to refer to links also.

2) Quotes inside commit title. (apart from the main enclosing quotes)
I think by design checkpatch doesn't handle this case.

Thanks,
Dwaipayan.