netdev - Re: [bpf-next PATCH 1/4] bpf: devmap introduce dev_map

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Date:   Thu, 10 May 2018 17:10:43 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org,
        Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Christoph Hellwig <hch@...radead.org>,
        BjörnTöpel <bjorn.topel@...el.com>,
        Magnus Karlsson <magnus.karlsson@...el.com>
Subject: Re: [bpf-next PATCH 1/4] bpf: devmap introduce dev_map_enqueue

Hi Jesper,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bpf-next/master]

url:    https://github.com/0day-ci/linux/commits/Jesper-Dangaard-Brouer/xdp-introduce-bulking-for-ndo_xdp_xmit-API/20180510-134105
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: x86_64-randconfig-x014-201818 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from kernel/sysctl.c:67:0:
>> include/linux/bpf.h:577:28: warning: 'struct bpf_dtab_netdev' declared inside parameter list will not be visible outside of this definition or declaration
    int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp)
                               ^~~~~~~~~~~~~~~

vim +577 include/linux/bpf.h

   574	
   575	struct xdp_buff;
   576	static inline
 > 577	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp)
   578	{
   579		return 0;
   580	}
   581	

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