tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dcc0b49040c70ad827a7f3d58a21b01fdb14e749 commit: 14483cbf040fcb38113497161088a1ce8ce5d713 net: broadcom CNIC: requires MMU date: 2 months ago config: riscv-randconfig-s031-20210212 (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-215-g0fb77bb6-dirty # 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 14483cbf040fcb38113497161088a1ce8ce5d713 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=riscv 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 >>): riscv64-linux-ld: drivers/net/ethernet/broadcom/cnic.o: in function `.L169': riscv64-linux-ld: drivers/net/ethernet/broadcom/cnic.o: in function `cnic_chk_pkt_rings': cnic.c:(.text+0x119c): undefined reference to `uio_event_notify' riscv64-linux-ld: drivers/net/ethernet/broadcom/cnic.o: in function `.L0 ': Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for CNIC Depends on NETDEVICES && ETHERNET && NET_VENDOR_BROADCOM && PCI && (IPV6 || IPV6 && MMU Selected by - SCSI_BNX2X_FCOE && SCSI_LOWLEVEL && SCSI && PCI && (IPV6 || IPV6 && LIBFC && LIBFCOE --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org