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

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Date:   Wed, 25 Nov 2020 09:47:14 +0100
From:   Jessica Yu <jeyu@...nel.org>
To:     Salvatore Bonaccorso <carnil@...ian.org>
Cc:     Steve French <smfrench@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...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

+++ Salvatore Bonaccorso [25/11/20 07:01 +0100]:
>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?

Yeah, likely it's a distro packaging issue. We had to account for
scripts/module.lds recently on openSUSE for example:

    https://github.com/openSUSE/kernel-source/commit/fe37c160c33dc09edff1781810aa098a2c316e20

Jessica