Hi Krzysztof, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 92ed301919932f777713b9172e525674157e983d commit: e93a1695d7fb551376b1c1220a267d032b6ad159 iommu: Enable compile testing for some of drivers date: 5 months ago config: x86_64-randconfig-r005-20200726 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 8bf4c1f4fb257774f66c8cda07adc6c5e8668326) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout e93a1695d7fb551376b1c1220a267d032b6ad159 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> All warnings (new ones prefixed by >>): >> drivers/iommu/mtk_iommu.c:799:34: warning: unused variable >> 'mtk_iommu_of_ids' [-Wunused-const-variable] static const struct of_device_id mtk_iommu_of_ids[] = { ^ 1 warning generated. vim +/mtk_iommu_of_ids +799 drivers/iommu/mtk_iommu.c 907ba6a195991a Yong Wu 2019-08-24 798 0df4fabe208d95 Yong Wu 2016-02-23 @799 static const struct of_device_id mtk_iommu_of_ids[] = { cecdce9d7eed33 Yong Wu 2019-08-24 800 { .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data}, cecdce9d7eed33 Yong Wu 2019-08-24 801 { .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data}, 907ba6a195991a Yong Wu 2019-08-24 802 { .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data}, 0df4fabe208d95 Yong Wu 2016-02-23 803 {} 0df4fabe208d95 Yong Wu 2016-02-23 804 }; 0df4fabe208d95 Yong Wu 2016-02-23 805 :::::: The code at line 799 was first introduced by commit :::::: 0df4fabe208d9576f2671d31e77cf46d20fdcd01 iommu/mediatek: Add mt8173 IOMMU driver :::::: TO: Yong Wu <[email protected]> :::::: CC: Joerg Roedel <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
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