Hi Krzysztof, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f37be72473a007d5d66c52f6cdf43fc8c0961f95 commit: 19bd695b0f7b5fc13f44645d0d0f446a6d7b7f99 [3527/3539] ia64: fix build error with !COREDUMP config: ia64-randconfig-r012-20200826 (attached as .config) compiler: ia64-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 git checkout 19bd695b0f7b5fc13f44645d0d0f446a6d7b7f99 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): ERROR: modpost: "min_low_pfn" [drivers/mmc/core/mmc_core.ko] undefined! ERROR: modpost: "max_low_pfn" [drivers/mmc/core/mmc_core.ko] undefined! ERROR: modpost: "max_low_pfn" [drivers/usb/misc/usbtest.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/usb/misc/usbtest.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/scsi/scsi_mod.ko] undefined! >> ERROR: modpost: "max_low_pfn" [drivers/scsi/scsi_mod.ko] undefined! ERROR: modpost: "max_low_pfn" [crypto/tcrypt.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/tcrypt.ko] undefined! ERROR: modpost: "max_low_pfn" [crypto/ccm.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/ccm.ko] undefined! ERROR: modpost: "max_low_pfn" [crypto/gcm.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/gcm.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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