Hi Patrick,

Thank you for the patch! Perhaps something to improve:

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

url:    
https://github.com/0day-ci/linux/commits/Patrick-Ruddy/netlink-ipv4-IGMP-join-notifications/20180831-105548
config: i386-randconfig-a1-201834 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from net//bridge/br_multicast.c:16:0:
>> include/linux/igmp.h:134:16: warning: 'struct netlink_callback' declared 
>> inside parameter list
            struct net_device *dev);
                   ^
>> include/linux/igmp.h:134:16: warning: its scope is only this definition or 
>> declaration, which is probably not what you want

vim +134 include/linux/igmp.h

   108  
   109  extern int ip_check_mc_rcu(struct in_device *dev, __be32 mc_addr, 
__be32 src_addr, u8 proto);
   110  extern int igmp_rcv(struct sk_buff *);
   111  extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
   112  extern int ip_mc_join_group_ssm(struct sock *sk, struct ip_mreqn *imr,
   113                                  unsigned int mode);
   114  extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
   115  extern void ip_mc_drop_socket(struct sock *sk);
   116  extern int ip_mc_source(int add, int omode, struct sock *sk,
   117                  struct ip_mreq_source *mreqs, int ifindex);
   118  extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int 
ifindex);
   119  extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
   120                  struct ip_msfilter __user *optval, int __user *optlen);
   121  extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
   122                  struct group_filter __user *optval, int __user *optlen);
   123  extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt,
   124                            int dif, int sdif);
   125  extern void ip_mc_init_dev(struct in_device *);
   126  extern void ip_mc_destroy_dev(struct in_device *);
   127  extern void ip_mc_up(struct in_device *);
   128  extern void ip_mc_down(struct in_device *);
   129  extern void ip_mc_unmap(struct in_device *);
   130  extern void ip_mc_remap(struct in_device *);
   131  extern void ip_mc_dec_group(struct in_device *in_dev, __be32 addr);
   132  extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
   133  extern int ip_mc_dump_ifaddr(struct sk_buff *skb, struct 
netlink_callback *cb,
 > 134                               struct net_device *dev);
   135  int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed);
   136  

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Attachment: .config.gz
Description: application/gzip

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