Hi Linus,

[auto build test ERROR on net/master]
[also build test ERROR on v4.5-rc5 next-20160223]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Linus-L-ssing/net-fix-bridge-multicast-packet-checksum-validation/20160224-091615
config: i386-randconfig-x004-201608 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/ip.h:20:0,
                    from include/net/ip.h:26,
                    from include/linux/errqueue.h:5,
                    from net/core/sock.c:96:

quoted

include/linux/skbuff.h:2826:20: error: redefinition of 'skb_postpush_rcsum'

    static inline void skb_postpush_rcsum(struct sk_buff *skb,
                       ^
   include/linux/skbuff.h:2796:20: note: previous definition of 'skb_postpush_rcsum' was here
    static inline void skb_postpush_rcsum(struct sk_buff *skb,
                       ^

vim +/skb_postpush_rcsum +2826 include/linux/skbuff.h

31b33dfb Pravin B Shelar 2015-09-28  2820  		 skb_checksum_start_offset(skb) < 0)
6ae459bd Pravin B Shelar 2015-09-22  2821  		skb->ip_summed = CHECKSUM_NONE;
^1da177e Linus Torvalds  2005-04-16  2822  }
^1da177e Linus Torvalds  2005-04-16  2823  
cbb042f9 Herbert Xu      2006-03-20  2824  unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len);
cbb042f9 Herbert Xu      2006-03-20  2825  
f8ffad69 Daniel Borkmann 2016-01-07 @2826  static inline void skb_postpush_rcsum(struct sk_buff *skb,
f8ffad69 Daniel Borkmann 2016-01-07  2827  				      const void *start, unsigned int len)
f8ffad69 Daniel Borkmann 2016-01-07  2828  {
f8ffad69 Daniel Borkmann 2016-01-07  2829  	/* For performing the reverse operation to skb_postpull_rcsum(),

:::::: The code at line 2826 was first introduced by commit
:::::: f8ffad69c9f8b8dfb0b633425d4ef4d2493ba61a bpf: add skb_postpush_rcsum and fix dev_forward_skb occasions

:::::: TO: Daniel Borkmann [off-list ref]
:::::: CC: David S. Miller [off-list ref]

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