cnic.c:undefined reference to `uio_event_notify'

[kernel test robot]

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/?id=14483cbf040fcb38113497161088a1ce8ce5d713
        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@xxxxxxxxx>

All errors (new ones prefixed by >>):

   riscv64-linux-ld: drivers/net/ethernet/broadcom/cnic.o: in function `.L169':
>> cnic.c:(.text+0x1174): undefined reference to `uio_event_notify'
   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 ':
>> cnic.c:(.text+0xaac8): undefined reference to `__uio_register_device'
>> riscv64-linux-ld: cnic.c:(.text.unlikely+0x68): undefined reference to `uio_unregister_device'

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@xxxxxxxxxxxx

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