Hi Stefan,

[auto build test WARNING on net-next/master]
[also build test WARNING on v4.10-rc7]
[cannot apply to next-20170207]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Stefan-Br-ns/sierra_net-Add-support-for-IPv6-and-Dual-Stack-Link-Sense-Indications/20170207-105111
config: x86_64-randconfig-b0-02081035 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/net/usb/sierra_net.c: In function 'sierra_net_bind':
>> drivers/net/usb/sierra_net.c:687: warning: unused variable 'eth'

vim +/eth +687 drivers/net/usb/sierra_net.c

f7385ec9 Ming Lei      2012-10-24  671  	if (result < 0)
eb4fd8cd Elina Pasheva 2010-04-27  672  		return -EIO;
eb4fd8cd Elina Pasheva 2010-04-27  673  
f7385ec9 Ming Lei      2012-10-24  674  	*datap = le16_to_cpu(attrdata);
eb4fd8cd Elina Pasheva 2010-04-27  675  	return result;
eb4fd8cd Elina Pasheva 2010-04-27  676  }
eb4fd8cd Elina Pasheva 2010-04-27  677  
eb4fd8cd Elina Pasheva 2010-04-27  678  /*
eb4fd8cd Elina Pasheva 2010-04-27  679   * collects the bulk endpoints, the status endpoint.
eb4fd8cd Elina Pasheva 2010-04-27  680   */
eb4fd8cd Elina Pasheva 2010-04-27  681  static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf)
eb4fd8cd Elina Pasheva 2010-04-27  682  {
eb4fd8cd Elina Pasheva 2010-04-27  683  	u8	ifacenum;
eb4fd8cd Elina Pasheva 2010-04-27  684  	u8	numendpoints;
eb4fd8cd Elina Pasheva 2010-04-27  685  	u16	fwattr = 0;
eb4fd8cd Elina Pasheva 2010-04-27  686  	int	status;
eb4fd8cd Elina Pasheva 2010-04-27 @687  	struct ethhdr *eth;
eb4fd8cd Elina Pasheva 2010-04-27  688  	struct sierra_net_data *priv;
eb4fd8cd Elina Pasheva 2010-04-27  689  	static const u8 sync_tmplate[sizeof(priv->sync_msg)] = {
eb4fd8cd Elina Pasheva 2010-04-27  690  		0x00, 0x00, SIERRA_NET_HIP_MSYNC_ID, 0x00};
eb4fd8cd Elina Pasheva 2010-04-27  691  	static const u8 shdwn_tmplate[sizeof(priv->shdwn_msg)] = {
eb4fd8cd Elina Pasheva 2010-04-27  692  		0x00, 0x00, SIERRA_NET_HIP_SHUTD_ID, 0x00};
eb4fd8cd Elina Pasheva 2010-04-27  693  
eb4fd8cd Elina Pasheva 2010-04-27  694  	dev_dbg(&dev->udev->dev, "%s", __func__);
eb4fd8cd Elina Pasheva 2010-04-27  695  

:::::: The code at line 687 was first introduced by commit
:::::: eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d net/usb: add sierra_net.c driver

:::::: TO: Elina Pasheva <epasheva@sierrawireless.com>
:::::: CC: David S. Miller <davem@davemloft.net>

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