Hi Stephen, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f117c01187301a087412bd6697fcf5463cb427d8 commit: e6f192066965ec00884c652e01f974d200261097 [6601/7172] Merge branch 'clk-next' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git config: s390-allmodconfig 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e6f192066965ec00884c652e01f974d200261097 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout e6f192066965ec00884c652e01f974d200261097 # 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 >>, old ones prefixed by <<): >> ERROR: modpost: "devm_platform_ioremap_resource" [drivers/clk/xilinx/clk-xlnx-clock-wizard.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/qcom/hdma.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/fsl-edma.ko] undefined! ERROR: modpost: "devm_ioremap_resource" [drivers/dma/idma64.ko] undefined! ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko] undefined! ERROR: modpost: "ioremap" [drivers/tty/ipwireless/ipwireless.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/char/xillybus/xillybus_of.ko] undefined! ERROR: modpost: "devm_memremap" [drivers/misc/open-dice.ko] undefined! ERROR: modpost: "devm_memunmap" [drivers/misc/open-dice.ko] undefined! ERROR: modpost: "iounmap" [drivers/net/ethernet/8390/pcnet_cs.ko] undefined! WARNING: modpost: suppressed 16 unresolved symbol warnings because there were too many) -- 0-DAY CI Kernel Test Service https://01.org/lkp