linux-kernel - [jpirko-mlxsw:petrm_soft_counters 7/7] net/core/rtnetlink.c:5101:15: error: unused variable 'size'

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Message-ID: <202111130655.JKySWFN2-lkp@intel.com>
Date:   Sat, 13 Nov 2021 06:56:05 +0800
From:   kernel test robot <lkp@...el.com>
To:     Petr Machata <petrm@...dia.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [jpirko-mlxsw:petrm_soft_counters 7/7] net/core/rtnetlink.c:5101:15:
 error: unused variable 'size'

tree:   https://github.com/jpirko/linux_mlxsw petrm_soft_counters
head:   d35d00a6d28ff7a34145438df3a2b39abd00edc3
commit: d35d00a6d28ff7a34145438df3a2b39abd00edc3 [7/7] wip
config: riscv-buildonly-randconfig-r002-20211111 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dddeeafb529e769cde87bd29ef6271ac6bfa5c)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/jpirko/linux_mlxsw/commit/d35d00a6d28ff7a34145438df3a2b39abd00edc3
        git remote add jpirko-mlxsw https://github.com/jpirko/linux_mlxsw
        git fetch --no-tags jpirko-mlxsw petrm_soft_counters
        git checkout d35d00a6d28ff7a34145438df3a2b39abd00edc3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 

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

All errors (new ones prefixed by >>):

>> net/core/rtnetlink.c:5101:15: error: unused variable 'size' [-Werror,-Wunused-variable]
           unsigned int size = info->get_size(info, dev);
                        ^
   1 error generated.


vim +/size +5101 net/core/rtnetlink.c

  5095	
  5096	static int
  5097	rtnl_offload_xstats_fill_hw_stats(const struct rtnl_offload_xstats_info *info,
  5098					  struct net_device *dev, struct sk_buff *skb,
  5099					  struct netlink_ext_ack *extack)
  5100	{
> 5101		unsigned int size = info->get_size(info, dev);
  5102		enum netdev_hw_stats_type used_hw_stats = 0;
  5103		struct rtnl_link_stats64 stats;
  5104		struct nlattr *nest;
  5105		int err;
  5106	
  5107		nest = nla_nest_start_noflag(skb, info->attr_id);
  5108		if (!nest)
  5109			return -EMSGSIZE;
  5110	
  5111		if (dev->offload_hw_stats) {
  5112			err = netdev_offload_xstats_hw_stats_get(dev, &stats,
  5113								 &used_hw_stats,
  5114								 extack);
  5115			if (err)
  5116				goto nla_put_failure;
  5117	
  5118			if (nla_put_64bit(skb, IFLA_OFFLOAD_XSTATS_HW_STATS_STATS,
  5119					  sizeof(stats), &stats,
  5120					  IFLA_OFFLOAD_XSTATS_UNSPEC))
  5121				goto nla_put_failure;
  5122		}
  5123	
  5124		if (nla_put_bitfield32(skb, IFLA_OFFLOAD_XSTATS_HW_STATS_USED_TYPE,
  5125				       used_hw_stats, IFLA_HW_STATS_ANY))
  5126			goto nla_put_failure;
  5127	
  5128		nla_nest_end(skb, nest);
  5129		return 0;
  5130	
  5131	nla_put_failure:
  5132		nla_nest_cancel(skb, nest);
  5133		return -EMSGSIZE;
  5134	}
  5135	

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

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