Hi Tobias,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Tobias-Waldekranz/net-bridge-Forward-offloading/20210427-010755
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 0ea1041bfa3aa2971f858edd9e05477c2d3d54a0
config: ia64-randconfig-r023-20210426 (attached as .config)
compiler: ia64-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://github.com/0day-ci/linux/commit/c8cc1347cff5d5327c34c4d90e4dce50ced8121d
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tobias-Waldekranz/net-bridge-Forward-offloading/20210427-010755
        git checkout c8cc1347cff5d5327c34c4d90e4dce50ced8121d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=ia64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ia64-linux-ld: net/dsa/tag_dsa.o: in function `dsa_xmit':
>> tag_dsa.c:(.text+0x72): undefined reference to `mv88e6xxx_dst_bridge_to_dsa'

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