Hi Gioh, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on kees/for-next/pstore linus/master v5.12-rc6 next-20210408] [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/Gioh-Kim/lib-string-Introduce-sysfs_streqcase/20210408-173449 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e46d1b78a03d52306f21f77a4e4a144b6d31486 config: s390-randconfig-r036-20210408 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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/7de114025f207fa41a9cffdf91c28e9b914e09f4 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Gioh-Kim/lib-string-Introduce-sysfs_streqcase/20210408-173449 git checkout 7de114025f207fa41a9cffdf91c28e9b914e09f4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): s390-linux-ld: drivers/dma/altera-msgdma.o: in function `request_and_map': altera-msgdma.c:(.text+0x408): undefined reference to `devm_ioremap' s390-linux-ld: drivers/dma/idma64.o: in function `idma64_platform_probe': idma64.c:(.text+0x1c0a): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/dma/sf-pdma/sf-pdma.o: in function `sf_pdma_probe': sf-pdma.c:(.text+0xc64): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/dma/qcom/hidma.o: in function `hidma_probe': hidma.c:(.text+0xd64): undefined reference to `devm_ioremap_resource' s390-linux-ld: hidma.c:(.text+0xdc8): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/dma/xilinx/xilinx_dpdma.o: in function `xilinx_dpdma_probe': xilinx_dpdma.c:(.text+0x20be): undefined reference to `devm_platform_ioremap_resource' s390-linux-ld: drivers/base/core.o: in function `device_find_child_by_name': core.c:(.text+0xb38e): undefined reference to `sysfs_streq' s390-linux-ld: drivers/base/core.o: in function `device_match_name': core.c:(.text+0x11a22): undefined reference to `sysfs_streq' s390-linux-ld: drivers/base/memory.o: in function `auto_online_blocks_store': >> memory.c:(.text+0x184): undefined reference to `sysfs_streq' s390-linux-ld: drivers/base/memory.o: in function `state_store': memory.c:(.text+0x368): undefined reference to `sysfs_streq' s390-linux-ld: drivers/base/memory.o: in function `mhp_online_type_from_str': memory.c:(.text+0xc20): undefined reference to `sysfs_streq' s390-linux-ld: lib/string.o:string.c:(.text+0xab6): more undefined references to `sysfs_streq' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org