linux-kernel - [mingo-tip:sched/headers 2005/2579] net/ipv6/mcast.c:258:5: warning: no previous prototype for 'ipv6_sock_mc_join

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Message-ID: <202204211115.AswnonHW-lkp@intel.com>
Date:   Thu, 21 Apr 2022 14:44:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/headers 2005/2579] net/ipv6/mcast.c:258:5: warning:
 no previous prototype for 'ipv6_sock_mc_join_ssm'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   49e1ec6c70a6eb4b7de9250a455b8b63eb42afbe
commit: c69b0b89e88734be4e9bf8aad8f3fbcbf0b05df9 [2005/2579] headers/deps: net: Split <net/ipv6_api_sock.h> header out of <net/ipv6.h>
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220421/202204211115.AswnonHW-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=c69b0b89e88734be4e9bf8aad8f3fbcbf0b05df9
        git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
        git fetch --no-tags mingo-tip sched/headers
        git checkout c69b0b89e88734be4e9bf8aad8f3fbcbf0b05df9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/pci/ fs/crypto/ net/ipv6/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> net/ipv6/mcast.c:258:5: warning: no previous prototype for 'ipv6_sock_mc_join_ssm' [-Wmissing-prototypes]
     258 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex,
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/ipv6_sock_mc_join_ssm +258 net/ipv6/mcast.c

^1da177e4c3f415 Linus Torvalds 2005-04-16  257  
c7ea20c9da5b94e Hangbin Liu    2018-07-10 @258  int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex,
c7ea20c9da5b94e Hangbin Liu    2018-07-10  259  			  const struct in6_addr *addr, unsigned int mode)
c7ea20c9da5b94e Hangbin Liu    2018-07-10  260  {
c7ea20c9da5b94e Hangbin Liu    2018-07-10  261  	return __ipv6_sock_mc_join(sk, ifindex, addr, mode);
c7ea20c9da5b94e Hangbin Liu    2018-07-10  262  }
c7ea20c9da5b94e Hangbin Liu    2018-07-10  263  

:::::: The code at line 258 was first introduced by commit
:::::: c7ea20c9da5b94e400c8dcc0adb99411f2e430a6 ipv6/mcast: init as INCLUDE when join SSM INCLUDE group

:::::: TO: Hangbin Liu <liuhangbin@...il.com>
:::::: CC: David S. Miller <davem@...emloft.net>

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