netdev - Re: [PATCH 1/1] net: ipv4,ipv6: fix IPSTATS_MIB_OUTFORWDATAGRAMS increment after fragment check

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Date: Thu, 14 Sep 2023 17:34:28 +0800
From: kernel test robot <lkp@...el.com>
To: Heng Guo <heng.guo@...driver.com>, davem@...emloft.net,
	sahern@...nel.org, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com
Cc: oe-kbuild-all@...ts.linux.dev, netdev@...r.kernel.org,
	filip.pudak@...driver.com, heng.guo@...driver.com
Subject: Re: [PATCH 1/1] net: ipv4,ipv6: fix IPSTATS_MIB_OUTFORWDATAGRAMS
 increment after fragment check

Hi Heng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]
[also build test WARNING on net/main linus/master v6.6-rc1 next-20230914]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Heng-Guo/net-ipv4-ipv6-fix-IPSTATS_MIB_OUTFORWDATAGRAMS-increment-after-fragment-check/20230914-131757
base:   net-next/main
patch link:    https://lore.kernel.org/r/20230914051623.2180843-2-heng.guo%40windriver.com
patch subject: [PATCH 1/1] net: ipv4,ipv6: fix IPSTATS_MIB_OUTFORWDATAGRAMS increment after fragment check
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230914/202309141701.7OFxGdE5-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230914/202309141701.7OFxGdE5-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309141701.7OFxGdE5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv6/ip6_output.c: In function 'ip6_forward_finish':
>> net/ipv6/ip6_output.c:451:27: warning: unused variable 'dst' [-Wunused-variable]
     451 |         struct dst_entry *dst = skb_dst(skb);
         |                           ^~~


vim +/dst +451 net/ipv6/ip6_output.c

e21e0b5f19ac78 Ville Nuorvala    2006-09-22  447  
0c4b51f0054ce8 Eric W. Biederman 2015-09-15  448  static inline int ip6_forward_finish(struct net *net, struct sock *sk,
0c4b51f0054ce8 Eric W. Biederman 2015-09-15  449  				     struct sk_buff *skb)
^1da177e4c3f41 Linus Torvalds    2005-04-16  450  {
71a1c915238c97 Jeff Barnhill     2018-04-05 @451  	struct dst_entry *dst = skb_dst(skb);
71a1c915238c97 Jeff Barnhill     2018-04-05  452  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki