linux-kernel - Re: next-20241028: gcc-8-defconfig : ERROR: modpost: "__aeabi_uldivmod" [drivers/media/dvb-frontends/cxd2841er.ko] undefined!

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Message-ID: <456c79d2-5041-47c4-bed2-44d257524ddd@stanley.mountain>
Date: Thu, 31 Oct 2024 11:55:05 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: Linux ARM <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>,
	Linux Regressions <regressions@...ts.linux.dev>,
	lkft-triage@...ts.linaro.org, Arnd Bergmann <arnd@...db.de>,
	Anders Roxell <anders.roxell@...aro.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Linux Media Mailing List <linux-media@...r.kernel.org>
Subject: Re: next-20241028: gcc-8-defconfig : ERROR: modpost:
 "__aeabi_uldivmod" [drivers/media/dvb-frontends/cxd2841er.ko] undefined!

Is it possible to tie this to a commit?

This is a u64 variable getting divided somewhere or maybe the divisor is a u64?
But there haven't been any recent changes to the driver so probably the change
happened in a header file?  I looked the differences between the preprocessed
.i files from before and after and nothing jumped out at me.

I don't have a copy of gcc-8...

regards,
dan carpenter

On Wed, Oct 30, 2024 at 06:53:01PM +0530, Naresh Kamboju wrote:
> The arm builds failed with gcc-8 on Linux next-20241028
> and builds pass with gcc-13.
> 
> First seen on Linux next-20241028 tag.
>   Good: next-20241025
>   Bad:  next-20241028
> 
> arm:
>   build:
>     * gcc-8-imx_v6_v7_defconfig
>     * gcc-8-defconfig
>     * gcc-8-omap2plus_defconfig
>     * gcc-8-davinci_all_defconfig
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> 
> Build log:
> ---------
> ERROR: modpost: "__aeabi_uldivmod"
> [drivers/media/dvb-frontends/cxd2841er.ko] undefined!
> make[3]: *** [/builds/linux/scripts/Makefile.modpost:145:
> Module.symvers] Error 1
> make[3]: Target '__modpost' not remade because of errors.
> 
> Build image:
> -----------
> - https://storage.tuxsuite.com/public/linaro/lkft/builds/2o9bKKvq45ZlybLVnQ1Bl0hEVA5/
> - https://storage.tuxsuite.com/public/linaro/lkft/builds/2o9bKKvq45ZlybLVnQ1Bl0hEVA5/build.log
> 
> Steps to reproduce:
> ------------
>    - tuxmake --runtime podman --target-arch arm --toolchain gcc-8
> --kconfig defconfig
> 
> metadata:
> ----
>   git describe: next-20241030
>   git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>   git sha: 86e3904dcdc7e70e3257fc1de294a1b75f3d8d04
>   kernel config:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2o9bKKvq45ZlybLVnQ1Bl0hEVA5/config
>   build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2o9bKKvq45ZlybLVnQ1Bl0hEVA5/
>   toolchain: gcc-8
>   config: defconfig
>   arch: arm
> 
> --
> Linaro LKFT
> https://lkft.linaro.org