linux-kernel - Re: linux-next: build failure after merge of the modules tree

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Message-ID: <20210210232148.4f9d4a43@canb.auug.org.au>
Date:   Wed, 10 Feb 2021 23:21:48 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Jessica Yu <jeyu@...nel.org>
Cc:     Christoph Hellwig <hch@....de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: linux-next: build failure after merge of the modules tree

Hi Jessica,

On Wed, 10 Feb 2021 09:06:48 +0100 Jessica Yu <jeyu@...nel.org> wrote:
> 
> Sorry, by "feature" I meant CONFIG_TRIM_UNUSED_KSYMS. This config
> option was introduced around v4.7. If simply enabling it produces
> these compilation errors I was wondering if it ever built properly on
> powerpc.

Ah, of course.  So for a quick fix, you could revert just the changes
to lib/Kconfig and all the defconfigs.  That way all the UNUSED_SYMBOLS
infrastructure is still removed, but TRIM_UNUSED_KSYMS remains (un)set
whenever it used to be (un)set and that could then be cleaned up in a
followup patch set per architecture when we know it works.
-- 
Cheers,
Stephen Rothwell

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