tree: git://git.infradead.org/users/hch/misc.git swiotlb-init-cleanup head: f750d1f8e172aa6649e256f6aadefe27306599e2 commit: 5ff669c8c68185aa0d890f41dab39425272a50bc [10/11] swiotlb: merge swiotlb-xen initialization into swiotlb config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20220217/202202172128.Ye1qdA6H-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc swiotlb-init-cleanup git checkout 5ff669c8c68185aa0d890f41dab39425272a50bc # 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 >>): ld: arch/x86/kernel/pci-dma.o: in function `pci_iommu_init': pci-dma.c:(.init.text+0x1dd): undefined reference to `swiotlb_print_info' ld: arch/x86/kernel/pci-dma.o: in function `pci_iommu_alloc': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org