Hi Govind, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d5b2251d63b5344ee827d3680fa79bdb9f9ddfa1 commit: 1ff8ed786d5d8ed6d109affe6d732dfc85a45b2e [1077/7089] ath11k: use remoteproc only with AHB devices config: microblaze-randconfig-r033-20200911 (attached as .config) compiler: microblaze-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 1ff8ed786d5d8ed6d109affe6d732dfc85a45b2e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): ERROR: modpost: "min_low_pfn" [net/mac80211/mac80211.ko] undefined! ERROR: modpost: "min_low_pfn" [net/9p/9pnet_virtio.ko] undefined! ERROR: modpost: "min_low_pfn" [net/wireless/lib80211_crypt_ccmp.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/mtd/nand/raw/cadence-nand-controller.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/mtd/nand/raw/nand.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu_sink.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/mmc/core/mmc_core.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/usb/misc/usbtest.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/net/virtio_net.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/net/wireless/ath/ath6kl/ath6kl_sdio.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/tcrypt.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/asymmetric_keys/public_key.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org