Hi Bjorn, I love your patch! Perhaps something to improve: [auto build test WARNING on iommu/next] [also build test WARNING on arm-perf/for-next/perf v5.8-rc5 next-20200715] [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/Bjorn-Andersson/iommu-arm-smmu-Support-maintaining-bootloader-mappings/20200709-130417 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: arm64-randconfig-r022-20200715 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 02946de3802d3bc65bc9f2eb9b8d4969b5a7add8) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/iommu/arm-smmu.c:1927:5: warning: no previous prototype for function 'arm_smmu_setup_identity' [-Wmissing-prototypes] int arm_smmu_setup_identity(struct arm_smmu_device *smmu) ^ drivers/iommu/arm-smmu.c:1927:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int arm_smmu_setup_identity(struct arm_smmu_device *smmu) ^ static 1 warning generated. vim +/arm_smmu_setup_identity +1927 drivers/iommu/arm-smmu.c 1926 > 1927 int arm_smmu_setup_identity(struct arm_smmu_device *smmu) 1928 { 1929 int i; 1930 1931 for (i = 0; i < smmu->num_mapping_groups; i++) { 1932 if (smmu->smrs[i].valid) { 1933 smmu->s2crs[i].type = S2CR_TYPE_BYPASS; 1934 smmu->s2crs[i].privcfg = S2CR_PRIVCFG_DEFAULT; 1935 smmu->s2crs[i].cbndx = 0xff; 1936 smmu->s2crs[i].count++; 1937 } 1938 } 1939 1940 return 0; 1941 } 1942 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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