linux-kernel - Re: Ubuntu mainline kernel builds now failing not able to find module.lds file

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Message-ID: <20201125060124.GA25831@lorien.valinor.li>
Date:   Wed, 25 Nov 2020 07:01:24 +0100
From:   Salvatore Bonaccorso <carnil@...ian.org>
To:     Steve French <smfrench@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Jessica Yu <jeyu@...nel.org>, Will Deacon <will@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: Ubuntu mainline kernel builds now failing not able to find
 module.lds file

Hi Steve,

On Fri, Oct 30, 2020 at 12:43:24AM -0500, Steve French wrote:
> I typically build cifs.ko for testing using the latest Ubuntu mainline
> build - but building a module in the 5.10-rc1 kernel - while booted to
> the 5.10-rc1 ubuntu mainlinekerel - e.g. "make C=1 -C
> /usr/src/linux-headers-`uname -r` M=`pwd` modules
> CF=-D__CHECK_ENDIAN__"
> which has worked for years - no longer works.
> 
> make: Entering directory '/usr/src/linux-headers-5.10.0-051000rc1-generic'
> make[2]: *** No rule to make target 'scripts/module.lds', needed by
> '/home/smfrench/cifs-2.6/fs/cifs/cifs.ko'.  Stop.
> make[1]: *** [scripts/Makefile.modpost:117: __modpost] Error 2
> make: *** [Makefile:1703: modules] Error 2
> make: Leaving directory '/usr/src/linux-headers-5.10.0-051000rc1-generic'
> 
> I don't see a file in scripts/module.lds in
> /usr/src/linux-headers-5.10.0-051000rc1-generic/scripts directory
> 
> copying from scripts/module.lds in the 5.10-rc1 git tree to
> /usr/src/linux-headers-5.10.0-051000rc1-generic/scripts fixed the
> problem but was wondering if this is just a packaging problem with
> Ubuntu (missing a file in the kernel headers package for their
> mainline daily builds?)

There is 596b0474d3d9 ("kbuild: preprocess module linker script") in
v5.10-rc1 causing this. So likely the packaging will need some
adjustment to cope with that change?

Have you by chance verified it is not a problem with the upstream
targets?

Regards,
Salvatore