Hi Anshuman, It's probably a bug fix that unveils the link errors. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 42f82040ee66db13525dc6f14b8559890b2f4c1c commit: c62da0c35d58518ddb26ff641d2485596567fd96 mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS date: 3 months ago config: microblaze-randconfig-c004-20200710 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>, old ones prefixed by <<): ERROR: modpost: "min_low_pfn" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined! ERROR: modpost: "min_low_pfn" [drivers/md/dm-integrity.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" [crypto/asymmetric_keys/asym_tpm.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org