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Date:   Thu, 3 Dec 2020 12:40:47 +0200
From:   Leon Romanovsky <leon@kernel.org>
To:     Geert Uytterhoeven <geert@linux-m68k.org>
Cc:     Dan Williams <dan.j.williams@intel.com>,
        "ksummit-discuss@lists.linuxfoundation.org" 
        <ksummit-discuss@lists.linuxfoundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [Ksummit-discuss] crediting bug reports and fixes folded into
 original patch
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On Thu, Dec 03, 2020 at 10:36:56AM +0100, Geert Uytterhoeven wrote:
> On Thu, Dec 3, 2020 at 10:35 AM Leon Romanovsky <leon@kernel.org> wrote:
> > On Wed, Dec 02, 2020 at 08:02:27PM -0800, Dan Williams wrote:
> > > On Wed, Dec 2, 2020 at 3:44 PM Vlastimil Babka <vbabka@suse.cz> wrote:
> > > > there was a bit of debate on Twitter about this, so I thought I would bring it
> > > > here. Imagine a scenario where patch sits as a commit in -next and there's a bug
> > > > report or fix, possibly by a bot or with some static analysis. The maintainer
> > > > decides to fold it into the original patch, which makes sense for e.g.
> > > > bisectability. But there seem to be no clear rules about attribution in this
> > > > case, which looks like there should be, probably in
> > > > Documentation/maintainer/modifying-patches.rst
> > > >
> > > > The original bug fix might include a From: $author, a Reported-by: (e.g.
> > > > syzbot), Fixes: $next-commit, some tag such as Addresses-Coverity: to credit the
> > > > static analysis tool, and an SoB. After folding, all that's left might be a line
> > > > as "include fix from $author" in the SoB area. This is a loss of
> > > > metadata/attribution just due to folding, and might make contributors unhappy.
> > > > Had they sent the fix after the original commit was mainline and immutable, all
> > > > the info above would "survive" in the form of new commit.
> > > >
> > > > So I think we could decide what the proper format would be, and document it
> > > > properly. I personally wouldn't mind just copy/pasting the whole commit message
> > > > of the fix (with just a short issue description, no need to include stacktraces
> > > > etc if the fix is folded), we could just standardize where, and how to delimit
> > > > it from the main commit message. If it's a report (person or bot) of a bug that
> > > > the main author then fixed, preserve the Reported-by in the same way (making
> > > > clear it's not a Reported-By for the "main thing" addressed by the commit).
> > > >
> > > > In the debate one less verbose alternatve proposed was a SoB with comment
> > > > describing it's for a fix and not whole patch, as some see SoB as the main mark
> > > > of contribution, that can be easily found and counted etc. I'm not so sure about
> > > > it myself, as AFAIK SoB is mainly a DCO thing, and for a maintainer it means
> > > > something else ("passed through my tree") than for a patch author. And this
> > > > approach would still lose the other tags.
> > > >
> > > > Thoughts?
> > >
> > > How about a convention to add a Reported-by: and a Link: to the
> > > incremental fixup discussion? It's just polite to credit helpful
> > > feedback, not sure it needs a more formal process.
> >
> > Maybe "Fixup-Reported-by:" and "Fixup-Link:"?
>
> And "Earlier-Review-Comments-Provided-by:"?
>
> How far do we want to go?

I don't want to overload existing meaning of "Reported-by:" and "Link:",
so anything else is fine by me.

I imagine that all those who puts their own Reviewed-by, Signed-off-by
and Tested-by in the same patch will be happy to use something like you
are proposing - "Co-developed-Signed-Reviewed-Tested-by:" tag.

Thanks

>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds