Hi Georgi, I love your patch! Yet something to improve: [auto build test ERROR on joro-iommu/next] [also build test ERROR on hnaz-mm/master linus/master v5.15-rc5 next-20211013] [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/Georgi-Djakov/iommu-iova-Add-sup... base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: i386-randconfig-a003-20211013 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a8c695542b2987eb9a203d5663a0740cb4725f) 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/dc4cf3ea2ffff2a4c30a8a2c395e830ea... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Georgi-Djakov/iommu-iova-Add-support-for-IOVA-max-alignment-tuning/20211014-021248 git checkout dc4cf3ea2ffff2a4c30a8a2c395e830ea37dd819 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 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 >>): early_param("iommu.max_align_shift", iommu_set_def_max_align_shift); ^ drivers/iommu/iova.c:52:12: note: to match this '(' early_param("iommu.max_align_shift", iommu_set_def_max_align_shift); ^ early_param("iommu.max_align_shift", iommu_set_def_max_align_shift); ^ int early_param("iommu.max_align_shift", iommu_set_def_max_align_shift); ^ void 1 warning and 3 errors generated. vim +52 drivers/iommu/iova.c 40 41 static int __init iommu_set_def_max_align_shift(char *str) 42 { 43 unsigned long max_align_shift; 44 45 int ret = kstrtoul(str, 10, &max_align_shift); 46 47 if (!ret) 48 iommu_max_align_shift = max_align_shift; 49 50 return 0; 51 } 53 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org