[intel-linux-intel-lts:5.10/yocto 3/3] drivers/net/ethernet/intel/igc/igc_ptp.c:438:11: warning: variable 'nsec' set but not used

[kernel test robot <lkp@intel.com>]

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tree:   https://github.com/intel/linux-intel-lts.git 5.10/yocto
head:   26a890b883303c93193cca69d5a096f550f93c6d
commit: 26a890b883303c93193cca69d5a096f550f93c6d [3/3] igc: Add support for DMA timestamp for non-PTP packets
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel/linux-intel-lts/commit/26a890b883303c93193cca69d5a096f550f93c6d
        git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-linux-intel-lts 5.10/yocto
        git checkout 26a890b883303c93193cca69d5a096f550f93c6d
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/intel/igc/igc_ptp.c: In function 'igc_ptp_dma_time_to_hwtstamp':
>> drivers/net/ethernet/intel/igc/igc_ptp.c:438:11: warning: variable 'nsec' set but not used [-Wunused-but-set-variable]
     438 |  u32 sec, nsec;
         |           ^~~~


vim +/nsec +438 drivers/net/ethernet/intel/igc/igc_ptp.c

   432	
   433	static void igc_ptp_dma_time_to_hwtstamp(struct igc_adapter *adapter,
   434						 struct skb_shared_hwtstamps *hwtstamps,
   435						 u64 systim)
   436	{
   437		struct igc_hw *hw = &adapter->hw;
 > 438		u32 sec, nsec;
   439	
   440		/* FIXME: use a workqueue to read these values to avoid
   441		 * reading these registers in the hot path.
   442		 */
   443		nsec = rd32(IGC_SYSTIML);
   444		sec = rd32(IGC_SYSTIMH);
   445	
   446		switch (adapter->hw.mac.type) {
   447		case igc_i225:
   448			memset(hwtstamps, 0, sizeof(*hwtstamps));
   449	
   450			/* HACK */
   451			hwtstamps->hwtstamp = ktime_set(sec, systim & 0xFFFFFFFF);
   452			break;
   453		default:
   454			break;
   455		}
   456	}
   457	

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

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