Hi Krzysztof, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 051e6b7e34b9bd24f46725f74994a4d3a653966e commit: e93a1695d7fb551376b1c1220a267d032b6ad159 iommu: Enable compile testing for some of drivers date: 2 months ago config: ia64-randconfig-r015-20200515 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout e93a1695d7fb551376b1c1220a267d032b6ad159 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): drivers/iommu/rockchip-iommu.c: In function 'rk_iommu_from_dev': 839 | struct rk_iommudata *data = dev->archdata.iommu; | ^ drivers/iommu/rockchip-iommu.c: In function 'rk_iommu_add_device': drivers/iommu/rockchip-iommu.c:1063:22: error: 'struct dev_archdata' has no member named 'iommu' 1063 | data = dev->archdata.iommu; | ^ drivers/iommu/rockchip-iommu.c: In function 'rk_iommu_remove_device': drivers/iommu/rockchip-iommu.c:1084:43: error: 'struct dev_archdata' has no member named 'iommu' 1084 | struct rk_iommudata *data = dev->archdata.iommu; | ^ drivers/iommu/rockchip-iommu.c: In function 'rk_iommu_of_xlate': drivers/iommu/rockchip-iommu.c:1115:15: error: 'struct dev_archdata' has no member named 'iommu' 1115 | dev->archdata.iommu = data; | ^ vim +839 drivers/iommu/rockchip-iommu.c c68a292152d322 Daniel Kurtz 2014-11-03 836 c68a292152d322 Daniel Kurtz 2014-11-03 837 static struct rk_iommu *rk_iommu_from_dev(struct device *dev) c68a292152d322 Daniel Kurtz 2014-11-03 838 { 5fd577c3eac3bd Jeffy Chen 2018-03-23 @839 struct rk_iommudata *data = dev->archdata.iommu; c68a292152d322 Daniel Kurtz 2014-11-03 840 5fd577c3eac3bd Jeffy Chen 2018-03-23 841 return data ? data->iommu : NULL; c68a292152d322 Daniel Kurtz 2014-11-03 842 } c68a292152d322 Daniel Kurtz 2014-11-03 843 :::::: The code at line 839 was first introduced by commit :::::: 5fd577c3eac3bdb9aebfec01e9b3d7f07a14f2dd iommu/rockchip: Use OF_IOMMU to attach devices automatically :::::: TO: Jeffy Chen <jeffy.chen(a)rock-chips.com&gt; :::::: CC: Joerg Roedel <jroedel(a)suse.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org