Hi Mario, Thank you for the patch! Yet something to improve: [auto build test ERROR on joro-iommu/next] [also build test ERROR on arm-perf/for-next/perf linus/master v5.17-rc8 next-20220315] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Mario-Limonciello/iommu-amd-Add-support-to-indicate-whether-DMA-remap-support-is-enabled/20220316-002821 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: x86_64-randconfig-a012 (https://download.01.org/0day-ci/archive/20220316/202203160904.VB4alCdg-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a6b2f50fb47da3baeee10b1906da6e30ac5d26ec) 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 # https://github.com/0day-ci/linux/commit/9b0b7079d348c607cba7af4c87eaae1a79e52d91 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mario-Limonciello/iommu-amd-Add-support-to-indicate-whether-DMA-remap-support-is-enabled/20220316-002821 git checkout 9b0b7079d348c607cba7af4c87eaae1a79e52d91 # 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=x86_64 SHELL=/bin/bash drivers/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/thunderbolt/domain.c:9: >> include/linux/amd-iommu.h:159:52: error: use of undeclared identifier 'ENODEV' static inline int amd_iommu_detect(void) { return -ENODEV; } ^ 1 error generated. vim +/ENODEV +159 include/linux/amd-iommu.h 6a9401a7ac13e6 arch/x86/include/asm/amd_iommu.h Joerg Roedel 2009-11-20 158 480125ba49ba62 arch/x86/include/asm/amd_iommu.h Konrad Rzeszutek Wilk 2010-08-26 @159 static inline int amd_iommu_detect(void) { return -ENODEV; } 6a9401a7ac13e6 arch/x86/include/asm/amd_iommu.h Joerg Roedel 2009-11-20 160 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx