* [intel-lts:5.10/preempt-rt 9797/17188] drivers/net/ethernet/intel/igc/igc_ptp.c:438:18: warning: variable 'nsec' set but not used
@ 2021-09-30 10:43 kernel test robot
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From: kernel test robot @ 2021-09-30 10:43 UTC (permalink / raw)
To: kbuild-all
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tree: https://github.com/intel/linux-intel-lts.git 5.10/preempt-rt
head: 3ab3139402e6adc34f10481f1c1c60459bcd0a7e
commit: 26a890b883303c93193cca69d5a096f550f93c6d [9797/17188] igc: Add support for DMA timestamp for non-PTP packets
config: parisc-buildonly-randconfig-r005-20210929 (attached as .config)
compiler: hppa-linux-gcc (GCC) 11.2.0
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
# https://github.com/intel/linux-intel-lts/commit/26a890b883303c93193cca69d5a096f550f93c6d
git remote add intel-lts https://github.com/intel/linux-intel-lts.git
git fetch --no-tags intel-lts 5.10/preempt-rt
git checkout 26a890b883303c93193cca69d5a096f550f93c6d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=parisc
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:438:18: 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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2021-09-30 10:43 [intel-lts:5.10/preempt-rt 9797/17188] drivers/net/ethernet/intel/igc/igc_ptp.c:438:18: warning: variable 'nsec' set but not used kernel test robot
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