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-a003 (https://download.01.org/0day-ci/archive/20220218/202202180251.LDy8F41C-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): 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 make 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 >>): arch/x86/kernel/pci-dma.c: In function 'pci_iommu_alloc': 94 | swiotlb_init(x86_swiotlb_enable, x86_swiotlb_flags); | ^~~~~~~~~~~~~~~~~ | x86_swiotlb_enable arch/x86/kernel/pci-dma.c:94:35: note: each undeclared identifier is reported only once for each function it appears in 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