netdev - [net-next:master 177/195] drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:4646: warning: unused variable 'port

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Date:   Fri, 20 Jan 2017 04:17:06 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Ganesh Goudar <ganeshgr@...lsio.com>
Cc:     kbuild-all@...org, netdev@...r.kernel.org
Subject: [net-next:master 177/195]
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:4646: warning: unused
 variable 'port_vec'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   4567d686f5c6d955e57a3afa1741944c1e7f4033
commit: 96fe11f27b70f6b64f62a2d13ed209aa02e02a48 [177/195] cxgb4: Implement ndo_get_phys_port_id for mgmt dev
config: x86_64-randconfig-a0-01200234 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout 96fe11f27b70f6b64f62a2d13ed209aa02e02a48
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c: In function 'init_one':
>> drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:4646: warning: unused variable 'port_vec'
>> drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:4646: warning: unused variable 'v'
   drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c: In function 'cxgb_select_queue':
   drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:923: warning: 'vlan_tci' may be used uninitialized in this function
   At top level:
   cc1: warning: unrecognized command line option "-Wno-maybe-uninitialized"
   drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.o: warning: objtool: __skb_put()+0x65: function has unreachable instruction

vim +/port_vec +4646 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c

  4630			fill_vf_station_mac_addr(adap);
  4631		return num_vfs;
  4632	}
  4633	#endif
  4634	
  4635	static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  4636	{
  4637		int func, i, err, s_qpp, qpp, num_seg;
  4638		struct port_info *pi;
  4639		bool highdma = false;
  4640		struct adapter *adapter = NULL;
  4641		struct net_device *netdev;
  4642		void __iomem *regs;
  4643		u32 whoami, pl_rev;
  4644		enum chip_type chip;
  4645		static int adap_idx = 1;
> 4646		u32 v, port_vec;
  4647	
  4648		printk_once(KERN_INFO "%s - version %s\n", DRV_DESC, DRV_VERSION);
  4649	
  4650		err = pci_request_regions(pdev, KBUILD_MODNAME);
  4651		if (err) {
  4652			/* Just info, some other driver may have claimed the device. */
  4653			dev_info(&pdev->dev, "cannot obtain PCI resources\n");
  4654			return err;

---
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Download attachment ".config.gz" of type "application/gzip" (34801 bytes)