linux-kernel - Re: Cannot find symbol for section 69: .text.arch_max_swapfile

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Date:   Mon, 14 Aug 2023 11:38:18 -0400
From:   Peter Xu <peterx@...hat.com>
To:     kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        "Huang, Ying" <ying.huang@...el.com>
Subject: Re: Cannot find symbol for section 69: .text.arch_max_swapfile_size.

On Sat, Aug 12, 2023 at 09:11:33AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   190bf7b14b0cf3df19c059061be032bd8994a597
> commit: be45a4902c7caa717fee6b2f671e59b396ed395c mm/swap: cache maximum swapfile size when init swap
> date:   11 months ago
> config: mips-randconfig-r014-20230811 (https://download.01.org/0day-ci/archive/20230812/202308120906.Efohswpa-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> reproduce: (https://download.01.org/0day-ci/archive/20230812/202308120906.Efohswpa-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308120906.Efohswpa-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
> >> Cannot find symbol for section 69: .text.arch_max_swapfile_size.
>    mm/swapfile.o: failed

Hmm.. I don't really know what's the issue here, neither can I reproduce
this locally - the cross build seems to all work with the reproducer and I
can see mm/swapfile.o correctly generated.

$ wget https://download.01.org/0day-ci/archive/20230812/202308120906.Efohswpa-lkp@intel.com/config
$ mv config .config
$ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ./make.cross W=1 O=build_dir ARCH=mips olddefconfig
[...]
$ COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ./make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash
[...]
FIT description: Linux 6.5.0-rc4-00492-gad3232df3e41
Created:         Mon Aug 14 11:35:57 2023
 Image 0 (kernel)
  Description:  Linux 6.5.0-rc4-00492-gad3232df3e41
  Created:      Mon Aug 14 11:35:57 2023
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    1767982 Bytes = 1726.54 KiB = 1.69 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x8043e5f0
  Hash algo:    sha1
  Hash value:   750e28c2fdd0d73eec9b0d8dbf5655579cb1364c
 Default Configuration: 'conf-default'
 Configuration 0 (conf-default)
  Description:  Generic Linux kernel
  Kernel:       kernel
$ file build_dir/mm/swapfile.o 
build_dir/mm/swapfile.o: ELF 32-bit MSB relocatable, MIPS, MIPS32 version 1 (SYSV), not stripped

Please let me now if anyone knows what I'm missing.

-- 
Peter Xu