Hi Baoquan, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on next-20221007] [cannot apply to akpm-mm/mm-everything openrisc/for-next deller-parisc/for-next s390/features v6.0] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/mm-ioremap-Convert-architectures-to-take-GENERIC_IOREMAP-way/20221009-183524 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a6afa4199d3d038fbfdff5511f7523b0e30cb774 config: s390-buildonly-randconfig-r006-20221009 compiler: s390-linux-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/69f65149d2e87de076edbb2b4dd9532f8f57dd8b git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Baoquan-He/mm-ioremap-Convert-architectures-to-take-GENERIC_IOREMAP-way/20221009-183524 git checkout 69f65149d2e87de076edbb2b4dd9532f8f57dd8b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): s390-linux-ld: mm/ioremap.o: in function `ioremap_prot': >> ioremap.c:(.text+0x9a): undefined reference to `arch_ioremap' s390-linux-ld: mm/ioremap.o: in function `iounmap': >> ioremap.c:(.text+0x234): undefined reference to `arch_iounmap' s390-linux-ld: drivers/dma/qcom/hidma.o: in function `hidma_probe': hidma.c:(.text+0x4b46): undefined reference to `devm_ioremap_resource' s390-linux-ld: hidma.c:(.text+0x4b9e): undefined reference to `devm_ioremap_resource' -- 0-DAY CI Kernel Test Service https://01.org/lkp