[linux-next:master 1259/2798] undefined reference to `__this_module'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   aa515cdce7a151dcc14b7600d33f1414c6fa32c9
commit: ef3631220d2b3d8d14cf64464760505baa60d6ac [1259/2798] net: ks8851: Register MDIO bus and the internal PHY
config: microblaze-randconfig-r003-20210113 (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/next/linux-next.git/commit/?id=ef3631220d2b3d8d14cf64464760505baa60d6ac
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout ef3631220d2b3d8d14cf64464760505baa60d6ac
        # 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 <redacted>

All errors (new ones prefixed by >>):

   microblaze-linux-ld: drivers/net/ethernet/micrel/ks8851_common.o: in function `ks8851_probe_common':

quoted

(.text+0x2144): undefined reference to `__this_module'

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org