tree: git://git.infradead.org/nvme.git swiotlb-init-cleanup head: 2cfb7ec6b2292ac81243cacda06a2ca79b06f2c2 commit: 563c044b3b3c098f73df34a500203b45cd6708b0 [8/11] swiotlb: make the swiotlb_init interface more useful config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220218/202202180341.LKRIvHrs-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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 git remote add linux-nvme git://git.infradead.org/nvme.git git fetch --no-tags linux-nvme swiotlb-init-cleanup git checkout 563c044b3b3c098f73df34a500203b45cd6708b0 # 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=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): swiotlb_init(x86_swiotlb_enable, x86_swiotlb_flags); ^~~~~~~~~~~~~~~~~ x86_power_flags arch/x86/include/asm/cpufeature.h:39:27: note: 'x86_power_flags' declared here extern const char * const x86_power_flags[32]; ^ 1 error generated. vim +94 arch/x86/kernel/pci-dma.c 86 87 void __init pci_iommu_alloc(void) 88 { 89 pci_swiotlb_detect_4gb(); 90 gart_iommu_hole_init(); 91 amd_iommu_detect(); 92 detect_intel_iommu(); 93 95 } 96 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org