linux-kernel - Re: [RFC PATCH 0/3] kbuild: generate intermediate C files instead of copying

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Date:   Fri, 8 Sep 2017 10:22:30 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Sam Ravnborg <sam@...nborg.org>, Michal Marek <mmarek@...e.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Rob Herring <robh@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Richard Purdie <richard.purdie@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Markus Heiser <markus.heiser@...marit.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        SeongJae Park <sj38.park@...il.com>,
        "Yann E. MORIN" <yann.morin.1998@...e.fr>
Subject: Re: [RFC PATCH 0/3] kbuild: generate intermediate C files instead of
 copying _shipped files

On Thu, Sep 7, 2017 at 11:18 PM, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> If CONFIG_MODVERSIONS is enabled,
> I notice lots of error messages.
> WARNING: EXPORT symbol "finish_open" [vmlinux] version generation
> failed, symbol will not be versioned
>
> So, I think something was broken in scripts/genksyms/.
>
> Of course, it was a trivial conversion, so it should not be hard to fix...

Indeed, hopefully it would be trivial, but I don't even see the error here.

Of course, I only did a "make allmodconfig" to test the MODVERSIONS
case, I didn't actually install the modules. Is that error perhaps
only detected at install time?

I did build and install a kernel with that patch, but that's my actual
"real" config for the machine, and it didn't have MODVERSIONS enabled.

Oh, how I hate modversions. But I'll take a look if I can see what I
did wrong in the "Trivial and Obvious(tm)" conversion.

                  Linus