linux-kernel - [ammarfaizi2-block:netdev/net-next/master 150/160] net/smc/smc_sysctl.h:23:16: warning: no previous prototype for function 'smc_sysctl_net

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Date:   Tue, 8 Mar 2022 21:36:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dust Li <dust.li@...ux.alibaba.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:netdev/net-next/master 150/160]
 net/smc/smc_sysctl.h:23:16: warning: no previous prototype for function
 'smc_sysctl_net_init'

tree:   https://github.com/ammarfaizi2/linux-block netdev/net-next/master
head:   69adcb988a0675ce001dfc416d56fba2e8a85f48
commit: 7de8eb0d9039f16e1122d7aa524a1502a160c4ff [150/160] net/smc: fix compile warning for smc_sysctl
config: arm-randconfig-r024-20220308 (https://download.01.org/0day-ci/archive/20220308/202203082117.G0KHS6qO-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/ammarfaizi2/linux-block/commit/7de8eb0d9039f16e1122d7aa524a1502a160c4ff
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block netdev/net-next/master
        git checkout 7de8eb0d9039f16e1122d7aa524a1502a160c4ff
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash net/

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 >>):

   In file included from net/smc/af_smc.c:54:
>> net/smc/smc_sysctl.h:23:16: warning: no previous prototype for function 'smc_sysctl_net_init' [-Wmissing-prototypes]
   int __net_init smc_sysctl_net_init(struct net *net)
                  ^
   net/smc/smc_sysctl.h:23:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __net_init smc_sysctl_net_init(struct net *net)
   ^
   static 
>> net/smc/smc_sysctl.h:29:17: warning: no previous prototype for function 'smc_sysctl_net_exit' [-Wmissing-prototypes]
   void __net_exit smc_sysctl_net_exit(struct net *net) { }
                   ^
   net/smc/smc_sysctl.h:29:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __net_exit smc_sysctl_net_exit(struct net *net) { }
   ^
   static 
   2 warnings generated.


vim +/smc_sysctl_net_init +23 net/smc/smc_sysctl.h

    22	
  > 23	int __net_init smc_sysctl_net_init(struct net *net)
    24	{
    25		net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
    26		return 0;
    27	}
    28	
  > 29	void __net_exit smc_sysctl_net_exit(struct net *net) { }
    30	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org