[net-next:master 58/77] filter.c:undefined reference to `__dev_map_flush'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   24251c264798ac5a72667245c2650676d7ac2108
commit: 9d6e005287ee23c7e25b04f4ad007bdbaf4fc438 [58/77] xdp: bpf redirect with map sample program
config: x86_64-acpi-redef (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 9d6e005287ee23c7e25b04f4ad007bdbaf4fc438
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   net/core/filter.o: In function `xdp_do_flush_map':

quoted

filter.c:(.text+0x41b4): undefined reference to `__dev_map_flush'

   net/core/filter.o: In function `__bpf_tx_xdp':

quoted

filter.c:(.text+0x42ec): undefined reference to `__dev_map_insert_ctx'

   net/core/filter.o: In function `xdp_do_redirect_map':
   filter.c:(.text+0x4349): undefined reference to `__dev_map_lookup_elem'

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