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Date:   Thu, 18 Apr 2019 16:06:51 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Masahiro Yamada <yamada.masahiro@socionext.com>
Cc:     Douglas Anderson <dianders@chromium.org>,
        Daniel Thompson <daniel.thompson@linaro.org>,
        Jason Wessel <jason.wessel@windriver.com>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Kees Cook <keescook@chromium.org>,
        kgdb-bugreport@lists.sourceforge.net,
        Johannes Weiner <hannes@cmpxchg.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Nicholas Mc Guire <hofrat@osadl.org>,
        Joe Perches <joe@perches.com>
Subject: Re: [PATCH] kdb: Get rid of broken attempt to print CCVERSION in
 kdb summary
Message-Id: <20190418160651.40cb6a11186a6c6028e9d20d@linux-foundation.org>
In-Reply-To: <CAK7LNAR4Ty8835sfo4HSvBsMCsV65mY2HOajFSY2TOYurmkFdw@mail.gmail.com>
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        <CAK7LNARYMy2=viA1et9tZk409M=OSteD5D675oAKQEs6SG77HQ@mail.gmail.com>
        <20190416163034.3e642818ebf27ed6891c1981@linux-foundation.org>
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On Wed, 17 Apr 2019 15:37:49 +0900 Masahiro Yamada <yamada.masahiro@socionext.com> wrote:

> > It's pretty benign: Doug will still only get a single email.
> >
> >
> > checkpatch checks for duplicates cc's but I think it assumes that
> > things like
> >
> > Reported-by: fred
> > Tested-by: fred
> >
> > were intentional.
> >
> > It would perhaps be better for checkpatch to special-case the "Cc:
> > fred" tag and report a duplicated Cc: if fred was also mentioned in any
> > other tag.
> 
> Sorry, I do not understand what you mean.
> 
> 
> Douglas did not add any Cc: tag at all
> in his original patch:
> https://lore.kernel.org/patchwork/patch/1053953/
> 
> 
> It's you who added the Cc: tags
> (and I am guessing you did it by scripting.)
> 
> Why is this topic related to checkpatch?

Because I regularly check all patches with checkpatch but checkpatch
failed to detect that I had

Signed-off-by: Douglas Anderson <dianders@chromium.org>
...
Cc: Douglas Anderson <dianders@chromium.org>

and I believe that checkpatch could and should have warned about this
situation.