Hi Shameer, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on pm/linux-next] [also build test WARNING on arm/for-next soc/for-next arm64/for-next/core linus/master v5.12-rc8] [cannot apply to iommu/next xlnx/master next-20210420] [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/Shameer-Kolothum/ACPI-IORT-Support-for-IORT-RMR-node/20210420-173125 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: arm-randconfig-r023-20210420 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/2501962e423895e2e4f126ff5998b226f4803186 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Shameer-Kolothum/ACPI-IORT-Support-for-IORT-RMR-node/20210420-173125 git checkout 2501962e423895e2e4f126ff5998b226f4803186 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from drivers/iommu/arm/arm-smmu/arm-smmu.c:24: >> include/linux/dma-iommu.h:94:71: warning: declaration of 'struct iommu_rmr' will not be visible outside of this function [-Wvisibility] static void iommu_dma_get_rmr_resv_regions(struct device *dev, struct iommu_rmr *rmr, ^ include/linux/dma-iommu.h:100:1: error: expected identifier or '(' { ^ 1 warning and 1 error generated. vim +94 include/linux/dma-iommu.h 93 > 94 static void iommu_dma_get_rmr_resv_regions(struct device *dev, struct iommu_rmr *rmr, 95 struct list_head *list) 96 { 97 } 98 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org