tree: https://github.com/frank-w/BPI-R2-4.14 5.14-hdmilarb2 head: 77b4c96140f9bec5bb54fc804b401af1c9a6b4b5 commit: a03e47787fdf1b8cf17dff02113ca385b4aaa131 [42/48] iommu, more debug config: x86_64-randconfig-a015-20210718 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 5d5b08761f944d5b9822d582378333cc4b36a0a7) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/frank-w/BPI-R2-4.14/commit/a03e47787fdf1b8cf17dff02113... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.14-hdmilarb2 git checkout a03e47787fdf1b8cf17dff02113ca385b4aaa131 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/iommu/of_iommu.c:9: include/linux/iommu.h:576:51: warning: cast to smaller integer type 'unsigned int' from 'struct iommu_fwspec *' [-Wpointer-to-int-cast] dev_err(dev,"%s:%d 0x%08x",__FUNCTION__,__LINE__,(unsigned int)fwspec); ^~~~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:112:32: note: expanded from macro 'dev_err' _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ dev_err(dev,"%s:%d ops:%08x",__FUNCTION__,__LINE__,(unsigned int)ops); ^~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:112:32: note: expanded from macro 'dev_err' _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ dev_err(dev,"%s:%d xlate:%08x",__FUNCTION__,__LINE__,(unsigned int)ops->of_xlate); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:112:32: note: expanded from macro 'dev_err' _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ 3 warnings generated. vim +30 drivers/iommu/of_iommu.c 21 22 static int of_iommu_xlate(struct device *dev, 23 struct of_phandle_args *iommu_spec) 24 { 25 const struct iommu_ops *ops; 26 struct fwnode_handle *fwnode = &iommu_spec->np->fwnode; 27 int ret; 28 29 ops = iommu_ops_from_fwnode(fwnode); 31 if (ops) 33 34 if ((ops && !ops->of_xlate) || 35 !of_device_is_available(iommu_spec->np)) 36 { 37 dev_err(dev,"no iommu"); 38 return NO_IOMMU; 39 } 40 ret = iommu_fwspec_init(dev, &iommu_spec->np->fwnode, ops); 41 if (ret) 42 return ret; 43 /* 44 * The otherwise-empty fwspec handily serves to indicate the specific 45 * IOMMU device we're waiting for, which will be useful if we ever get 46 * a proper probe-ordering dependency mechanism in future. 47 */ 48 if (!ops) 49 return driver_deferred_probe_check_state(dev); 50 51 if (!try_module_get(ops->owner)) 52 return -ENODEV; 53 54 ret = ops->of_xlate(dev, iommu_spec); 55 module_put(ops->owner); 56 return ret; 57 } 58 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org