Hi Sam, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on joro-iommu/next] [also build test ERROR on arm64/for-next/core robh/for-next v5.16 next-20220121] [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/Sam-Protsenko/iommu-samsung-Intr... base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20220122/202201221039.bzQd6bWe-lk...) compiler: alpha-linux-gcc (GCC) 11.2.0 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/c4eee4195bc6846406c79d60b8588e620... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sam-Protsenko/iommu-samsung-Introduce-Exynos-sysmmu-v8-driver/20220121-042059 git checkout c4eee4195bc6846406c79d60b8588e62017954f5 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/iommu/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): drivers/iommu/samsung-iommu.c: In function 'samsung_sysmmu_detach_dev': 487 | struct list_head *group_list; | ^~~~~~~~~~ drivers/iommu/samsung-iommu.c: In function 'samsung_sysmmu_of_xlate': 947 | struct iommu_fwspec *fwspec; | ^~~~~~ drivers/iommu/samsung-iommu.c: In function 'samsung_sysmmu_suspend': 1485 | dev->power.must_resume = true; | ^ vim +1485 drivers/iommu/samsung-iommu.c 1479 1480 static int __maybe_unused samsung_sysmmu_suspend(struct device *dev) 1481 { 1482 if (pm_runtime_status_suspended(dev)) 1483 return 0; 1484 1486 return samsung_sysmmu_runtime_suspend(dev); 1487 } 1488 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org