linux-kernel - Re: modpost Module.symver handling is broken in 5.6.0-rc7

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Message-ID: <20200326165036.GA22172@linux-8ccs>
Date:   Thu, 26 Mar 2020 17:50:37 +0100
From:   Jessica Yu <jeyu@...nel.org>
To:     David Laight <David.Laight@...lab.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        'Linus Torvalds' <torvalds@...ux-foundation.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Matthias Maennich <maennich@...gle.com>
Subject: Re: modpost Module.symver handling is broken in 5.6.0-rc7


+++ David Laight [26/03/20 16:25 +0000]:
>Something is currently broken in modpost.
>I'm guessing it is down to the recent patch that moved the
>namespace back to the end of the line.
>
>I'm building 2 'out of tree' modules that have a symbol dependency.
>When I build the 2nd module I get ERROR "symbol" undefined message.
>
>If I flip the order of the fields in Module.symver to the older order
>and link with modpost from 5.4.0-rc7 (which I happen to have lurking)
>it all works fine.
>
>Note that I'm using a named namespace, not the default one
>that is the full path of the module.
>
>I'll dig in a little further.

[ Adding more people to CC ]

Hi David,

Could you provide some more details about how I can reproduce the
issue? As I understand it, you have two out-of-tree modules, and one
has a symbol dependency on the second? Pasting the modpost error
messages helps too.

Thanks,

Jessica