Hi Stephen,

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

url:    https://github.com/0day-ci/linux/commits/Stephen-Hemminger/net-make-ndo_get_stats64-a-void-function/20170106-160123
config: xtensa-allmodconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All warnings (new ones prefixed by >>):

   drivers/net/macsec.c: In function 'macsec_get_stats64':
>> drivers/net/macsec.c:2897:3: warning: 'return' with a value, in function returning void
      return s;
      ^

vim +/return +2897 drivers/net/macsec.c

c09440f7 Sabrina Dubroca   2016-03-11  2881  	unsigned int extra = macsec->secy.icv_len + macsec_extra_len(true);
c09440f7 Sabrina Dubroca   2016-03-11  2882  
c09440f7 Sabrina Dubroca   2016-03-11  2883  	if (macsec->real_dev->mtu - extra < new_mtu)
c09440f7 Sabrina Dubroca   2016-03-11  2884  		return -ERANGE;
c09440f7 Sabrina Dubroca   2016-03-11  2885  
c09440f7 Sabrina Dubroca   2016-03-11  2886  	dev->mtu = new_mtu;
c09440f7 Sabrina Dubroca   2016-03-11  2887  
c09440f7 Sabrina Dubroca   2016-03-11  2888  	return 0;
c09440f7 Sabrina Dubroca   2016-03-11  2889  }
c09440f7 Sabrina Dubroca   2016-03-11  2890  
1e665d95 Stephen Hemminger 2017-01-05  2891  static void macsec_get_stats64(struct net_device *dev,
c09440f7 Sabrina Dubroca   2016-03-11  2892  			       struct rtnl_link_stats64 *s)
c09440f7 Sabrina Dubroca   2016-03-11  2893  {
c09440f7 Sabrina Dubroca   2016-03-11  2894  	int cpu;
c09440f7 Sabrina Dubroca   2016-03-11  2895  
c09440f7 Sabrina Dubroca   2016-03-11  2896  	if (!dev->tstats)
c09440f7 Sabrina Dubroca   2016-03-11 @2897  		return s;
c09440f7 Sabrina Dubroca   2016-03-11  2898  
c09440f7 Sabrina Dubroca   2016-03-11  2899  	for_each_possible_cpu(cpu) {
c09440f7 Sabrina Dubroca   2016-03-11  2900  		struct pcpu_sw_netstats *stats;
c09440f7 Sabrina Dubroca   2016-03-11  2901  		struct pcpu_sw_netstats tmp;
c09440f7 Sabrina Dubroca   2016-03-11  2902  		int start;
c09440f7 Sabrina Dubroca   2016-03-11  2903  
c09440f7 Sabrina Dubroca   2016-03-11  2904  		stats = per_cpu_ptr(dev->tstats, cpu);
c09440f7 Sabrina Dubroca   2016-03-11  2905  		do {

:::::: The code at line 2897 was first introduced by commit
:::::: c09440f7dcb304002dfced8c0fea289eb25f2da0 macsec: introduce IEEE 802.1AE driver

:::::: TO: Sabrina Dubroca <sd@queasysnail.net>
:::::: CC: David S. Miller <davem@davemloft.net>

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