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Date:   Wed, 17 Oct 2018 15:32:23 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Jeffrey Hugo <jhugo@codeaurora.org>
Cc:     Anders Roxell <anders.roxell@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>, gregkh@linuxfoundation.org,
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        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] serial: set suppress_bind_attrs flag only if
 builtin
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On Wed, 17 Oct 2018 16:21:08 -0600 Jeffrey Hugo <jhugo@codeaurora.org> wrote:

> On 10/17/2018 4:05 PM, Andrew Morton wrote:
> > On Wed, 17 Oct 2018 16:03:10 +0200 Anders Roxell <anders.roxell@linaro.org> wrote:
> > 
> >> Cc: Arnd Bergmann <arnd@arndb.de>
> >> Co-developed-by: Arnd Bergmann <arnd@arndb.de>
> >> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> > 
> > This should have Arnd's Signed-off-by: as well.
> 
> I'm just interested to know, why?

So that Arnd certifies that

        (a) The contribution was created in whole or in part by me and I
            have the right to submit it under the open source license
            indicated in the file; or

and all the other stuff in Documentation/process/submitting-patches.rst
section 11!

Also, because section 12 says so :)  And that final sentence is, I
believe, appropriate.