tree: https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git dev-queue head: 49dd24e929ffd092788636429902443068bf9ebc commit: 43483dcb31045ba36ac703314ca664429e339a95 [43/112] igc: Fix igc_ptp_rx_pktstamp() config: parisc-randconfig-s032-20201213 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-184-g1b896707-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git/comm... git remote add tnguy-next-queue https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git git fetch --no-tags tnguy-next-queue dev-queue git checkout 43483dcb31045ba36ac703314ca664429e339a95 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32 vim +181 drivers/net/ethernet/intel/igc/igc_ptp.c 153 154 /** 155 * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer 156 * @q_vector: Pointer to interrupt specific structure 157 * @va: Pointer to address containing Rx buffer 158 * @skb: Buffer containing timestamp and packet 159 * 160 * This function retrieves the timestamp saved in the beginning of packet 161 * buffer. While two timestamps are available, one in timer0 reference and the 162 * other in timer1 reference, this function considers only the timestamp in 163 * timer0 reference. 164 */ 165 void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, u32 *va, 166 struct sk_buff *skb) 167 { 168 struct igc_adapter *adapter = q_vector->adapter; 169 u64 regval; 170 int adjust; 171 172 /* Timestamps are saved in little endian at the beginning of the packet 173 * buffer following the layout: 174 * 175 * DWORD: | 0 | 1 | 2 | 3 | 176 * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH | 177 * 178 * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds 179 * part of the timestamp. 180 */ 182 regval |= (u64)le32_to_cpu(va[3]) << 32; 183 igc_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval); 184 185 /* Adjust timestamp for the RX latency based on link speed */ 186 switch (adapter->link_speed) { 187 case SPEED_10: 188 adjust = IGC_I225_RX_LATENCY_10; 189 break; 190 case SPEED_100: 191 adjust = IGC_I225_RX_LATENCY_100; 192 break; 193 case SPEED_1000: 194 adjust = IGC_I225_RX_LATENCY_1000; 195 break; 196 case SPEED_2500: 197 adjust = IGC_I225_RX_LATENCY_2500; 198 break; 199 default: 200 adjust = 0; 201 netdev_warn_once(adapter->netdev, "Imprecise timestamp\n"); 202 break; 203 } 204 skb_hwtstamps(skb)->hwtstamp = 205 ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust); 206 } 207 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org