linux-kernel - Re: [PATCH v3 4/4] iommu/io-pgtable-arm-selftests: Use KUnit

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Message-ID: <aNEHPo16_HgyYafz@google.com>
Date: Mon, 22 Sep 2025 08:22:22 +0000
From: Mostafa Saleh <smostafa@...gle.com>
To: kernel test robot <lkp@...el.com>
Cc: iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, oe-kbuild-all@...ts.linux.dev,
	robin.murphy@....com, will@...nel.org, joro@...tes.org,
	jgg@...pe.ca, praan@...gle.com, Jason Gunthorpe <jgg@...dia.com>
Subject: Re: [PATCH v3 4/4] iommu/io-pgtable-arm-selftests: Use KUnit

On Sat, Sep 20, 2025 at 06:42:59PM +0800, kernel test robot wrote:
> Hi Mostafa,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on soc/for-next]
> [also build test ERROR on linus/master v6.17-rc6 next-20250919]
> [cannot apply to joro-iommu/next]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Mostafa-Saleh/iommu-io-pgtable-arm-Simplify-error-prints-for-selftests/20250919-213912
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
> patch link:    https://lore.kernel.org/r/20250919133316.2741279-5-smostafa%40google.com
> patch subject: [PATCH v3 4/4] iommu/io-pgtable-arm-selftests: Use KUnit
> config: i386-randconfig-013-20250920 (https://download.01.org/0day-ci/archive/20250920/202509201819.f369wBHc-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250920/202509201819.f369wBHc-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/202509201819.f369wBHc-lkp@intel.com/
> 
> All error/warnings (new ones prefixed by >>, old ones prefixed by <<):
> 
> >> WARNING: modpost: drivers/iommu/io-pgtable-arm-selftests: section mismatch in reference: arm_lpae_run_tests+0x100 (section: .text) -> arm_lpae_dump_ops (section: .init.text)
> >> ERROR: modpost: "alloc_io_pgtable_ops" [drivers/iommu/io-pgtable-arm-selftests.ko] undefined!
> >> ERROR: modpost: "free_io_pgtable_ops" [drivers/iommu/io-pgtable-arm-selftests.ko] undefined!
> 
> Kconfig warnings: (for reference only)
>    WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE
>    Depends on [n]: IOMMU_SUPPORT [=y] && (ARM || ARM64 || COMPILE_TEST [=n]) && !GENERIC_ATOMIC64 [=n]
>    Selected by [m]:
>    - IOMMU_IO_PGTABLE_LPAE_KUNIT_TEST [=m] && IOMMU_SUPPORT [=y] && KUNIT [=m]
> 

There are 2 issues here:
- I missed one __init for dump_ops
- Then new kconfig change to select IOMMU_IO_PGTABLE_LPAE broke build for
  some ARM targets which select GENERIC_ATOMIC64

I will send a new version shortly

Thanks,
Mostafa

> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki