linux-kernel - Re: ld.lld: error: undefined symbol: socfpga_reset

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Message-ID: <67f432e2-1bfd-29dc-f2ed-051b47ef0844@kernel.org>
Date:   Sun, 6 Feb 2022 12:55:57 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Dinh Nguyen <dinguyen@...nel.org>
Subject: Re: ld.lld: error: undefined symbol: socfpga_reset_init

On 04/02/2022 22:12, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   dcb85f85fa6f142aae1fe86f399d4503d49f2b60
> commit: 4483397b03536506535d611b0cb28a81a69e8edf ARM: socfpga: drop ARCH_SOCFPGA
> date:   11 months ago
> config: arm-socfpga_defconfig (https://download.01.org/0day-ci/archive/20220205/202202050539.Mtk9I4Ef-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a73e4ce6a59b01f0e37037761c1e6889d539d233)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install arm cross compiling tool for clang build
>         # apt-get install binutils-arm-linux-gnueabi
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4483397b03536506535d611b0cb28a81a69e8edf
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 4483397b03536506535d611b0cb28a81a69e8edf
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>>> ld.lld: error: undefined symbol: socfpga_reset_init
>    >>> referenced by socfpga.c
>    >>>               socfpga.o:(socfpga_init_irq) in archive arch/arm/mach-socfpga/built-in.a
>    >>> referenced by socfpga.c
>    >>>               socfpga.o:(socfpga_arria10_init_irq) in archive arch/arm/mach-socfpga/built-in.a
> 

This looks like a false positive. On the socfpga defconfig arm build,
the socfpga_reset_init() (drivers/reset/reset-socfpga.c) is built.

I also could not reproduce it with GCC.

Best regards,
Krzysztof