linux-kernel - Re: next: 32-bit: ERROR: modpost: "__aeabi_uldivmod" [fs/btrfs/btrfs.ko] undefined!

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Date:   Tue, 21 Feb 2023 13:47:24 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        lkft-triage@...ts.linaro.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Anders Roxell <anders.roxell@...aro.org>,
        linux-btrfs@...r.kernel.org, David Sterba <dsterba@...e.com>,
        Josef Bacik <josef@...icpanda.com>, Chris Mason <clm@...com>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: next: 32-bit: ERROR: modpost: "__aeabi_uldivmod"
 [fs/btrfs/btrfs.ko] undefined!

On Mon, 20 Feb 2023 at 16:14, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> [Please ignore this email if it is already reported]
>
> Following build error noticed on 32bit arm and i386 with kselftest merge
> configs with gcc-10/12 on today's Linux next-20230220 tag.
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> Build regression:
>   - gcc-10-lkftconfig-kselftest
>   - gcc-12-lkftconfig-kselftest
>
> Build error:
> ERROR: modpost: "__aeabi_uldivmod" [fs/btrfs/btrfs.ko] undefined!
> make[2]: *** [scripts/Makefile.modpost:136: Module.symvers] Error 1
> make[2]: Target '__modpost' not remade because of errors.
> make[1]: *** [Makefile:1980: modpost] Error 2

Anders ran the bisect and found the first bad commit,

# first bad commit:
  [4a8c6e8a6dc8ae4ce2adb1f807b61b6d99088293]
  btrfs: replace btrfs_io_context::raid_map with a fixed u64 value

The reported build issues still noticed on today's Linux next-20230221.

Related threads are found in lore,
https://lore.kernel.org/lkml/CAMuHMdVwXB4YsCFEpLoTm8pxyjMty6tAT7joNj2EME4ynY8keQ@mail.gmail.com/

- Naresh