[kbuild-all] ERROR: modpost: "vhost_iotlb_itree_next" undefined!

Hi Eli, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f01c30de86f1047e9bae1b1b1417b0ce8dcd15b1 commit: 1a86b377aa2147a7c866b03142e848c18e5f3cb8 vdpa/mlx5: Add VDPA driver for supported mlx5 devices date: 3 months ago config: microblaze-randconfig-c004-20201031 (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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 1a86b377aa2147a7c866b03142e848c18e5f3cb8 # 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/smc/smc.ko] undefined! ERROR: modpost: "min_low_pfn" [net/ipv6/ah6.ko] undefined! ERROR: modpost: "min_low_pfn" [net/ipv4/ah4.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/ntb/test/ntb_perf.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/infiniband/hw/mthca/ib_mthca.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/mtd/spi-nor/spi-nor.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/target/iscsi/iscsi_target_mod.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/tty/serial/fsl_lpuart.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/dma/fsl-edma-common.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/rapidio/devices/rio_mport_cdev.ko] undefined! ERROR: modpost: "min_low_pfn" [crypto/tcrypt.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org