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Date:   Sun, 30 Oct 2016 09:16:12 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     pravin shelar <pshelar@....org>
Cc:     kbuild-all@...org, netdev@...r.kernel.org
Subject: [net:master 113/114] drivers/net/vxlan.c:947:21: warning: unused
 variable 'sock6'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git master
head:   fceb9c3e38252992bbf1a3028cc2f7b871211533
commit: c6fcc4fc5f8b592600c7409e769ab68da0fb1eca [113/114] vxlan: avoid using stale vxlan socket.
config: i386-randconfig-x012-201644 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout c6fcc4fc5f8b592600c7409e769ab68da0fb1eca
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/net/vxlan.c: In function 'vxlan_group_used':
>> drivers/net/vxlan.c:947:21: warning: unused variable 'sock6' [-Wunused-variable]
     struct vxlan_sock *sock6 = NULL;
                        ^~~~~

vim +/sock6 +947 drivers/net/vxlan.c

   931						 NUD_REACHABLE,
   932						 NLM_F_EXCL|NLM_F_CREATE,
   933						 vxlan->cfg.dst_port,
   934						 vxlan->default_dst.remote_vni,
   935						 0, NTF_SELF);
   936			spin_unlock(&vxlan->hash_lock);
   937		}
   938	
   939		return false;
   940	}
   941	
   942	/* See if multicast group is already in use by other ID */
   943	static bool vxlan_group_used(struct vxlan_net *vn, struct vxlan_dev *dev)
   944	{
   945		struct vxlan_dev *vxlan;
   946		struct vxlan_sock *sock4;
 > 947		struct vxlan_sock *sock6 = NULL;
   948		unsigned short family = dev->default_dst.remote_ip.sa.sa_family;
   949	
   950		sock4 = rtnl_dereference(dev->vn4_sock);
   951	
   952		/* The vxlan_sock is only used by dev, leaving group has
   953		 * no effect on other vxlan devices.
   954		 */
   955		if (family == AF_INET && sock4 && atomic_read(&sock4->refcnt) == 1)

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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