[nf-next:master 9/9] ipt_REJECT.c:(.text+0x120): multiple definition of `nf_reject_verify_csum'; net/ipv4/netfilter/nf_reject_ipv4.o:nf_reject_ipv4.c:(.text+0x470): first defined here

[kbuild test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master
head:   bfcf40da75597a7c6761ab7dd8bba18b487ae2d9
commit: bfcf40da75597a7c6761ab7dd8bba18b487ae2d9 [9/9] netfilter: reject: skip csum verification for protocols that don't support it
config: i386-defconfig (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        git checkout bfcf40da75597a7c6761ab7dd8bba18b487ae2d9
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   ld: net/ipv4/netfilter/ipt_REJECT.o: in function `nf_reject_verify_csum':
>> ipt_REJECT.c:(.text+0x120): multiple definition of `nf_reject_verify_csum'; net/ipv4/netfilter/nf_reject_ipv4.o:nf_reject_ipv4.c:(.text+0x470): first defined here
   ld: net/ipv6/netfilter/nf_reject_ipv6.o: in function `nf_reject_verify_csum':
   nf_reject_ipv6.c:(.text+0x5a0): multiple definition of `nf_reject_verify_csum'; net/ipv4/netfilter/nf_reject_ipv4.o:nf_reject_ipv4.c:(.text+0x470): first defined here
   ld: net/ipv6/netfilter/ip6t_REJECT.o: in function `nf_reject_verify_csum':
   ip6t_REJECT.c:(.text+0x190): multiple definition of `nf_reject_verify_csum'; net/ipv4/netfilter/nf_reject_ipv4.o:nf_reject_ipv4.c:(.text+0x470): first defined here

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