Hi Anand, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on driver-core/driver-core-testing linus/master v5.16-rc2] [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/Anand-Ashok-Dumbre/device-property-Add-fwnode_iomap/20211116-014240 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git debe436e77c72fcee804fb867f275e6d31aa999c config: s390-randconfig-r005-20211115 (https://download.01.org/0day-ci/archive/20211125/202111251848.snM0nERG-lkp@xxxxxxxxx/config) compiler: s390-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/057b01427afce16994b109c1f32a95bc46973e39 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Anand-Ashok-Dumbre/device-property-Add-fwnode_iomap/20211116-014240 git checkout 057b01427afce16994b109c1f32a95bc46973e39 # 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=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): s390-linux-ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory': coherent.c:(.text+0x128): undefined reference to `memremap' s390-linux-ld: coherent.c:(.text+0x31e): undefined reference to `memunmap' s390-linux-ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0xab6): undefined reference to `memunmap' s390-linux-ld: drivers/base/property.o: in function `fwnode_iomap': >> (.text+0x1dfc): undefined reference to `of_iomap' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx