Hi Sudarsana, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Yuval-Mintz/qed-Add-infrastructure-for-PTP-support/20170215-003051 config: i386-allmodconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/net/ethernet/qlogic/qed/qed_ptp.c: In function 'qed_ptp_hw_adjfreq': >> drivers/net/ethernet/qlogic/qed/qed_ptp.c:165:21: warning: 'best_period' may >> be used uninitialized in this function [-Wmaybe-uninitialized] s64 best_val, val, best_period, period, approx_dev, dif, dif2; ^~~~~~~~~~~ >> drivers/net/ethernet/qlogic/qed/qed_ptp.c:165:6: warning: 'best_val' may be >> used uninitialized in this function [-Wmaybe-uninitialized] s64 best_val, val, best_period, period, approx_dev, dif, dif2; ^~~~~~~~ vim +/best_period +165 drivers/net/ethernet/qlogic/qed/qed_ptp.c 149 /* Reset possibly old timestamps */ 150 qed_wr(p_hwfn, p_ptt, NIG_REG_LLH_PTP_HOST_BUF_SEQID, 151 QED_TIMESTAMP_MASK); 152 153 return 0; 154 } 155 156 /* Adjust the HW clock by a rate given in parts-per-billion (ppb) units. 157 * FW/HW accepts the adjustment value in terms of 3 parameters: 158 * Drift period - adjustment happens once in certain number of nano seconds. 159 * Drift value - time is adjusted by a certain value, for example by 5 ns. 160 * Drift direction - add or subtract the adjustment value. 161 * The routine translates ppb into the adjustment triplet in an optimal manner. 162 */ 163 static int qed_ptp_hw_adjfreq(struct qed_dev *cdev, s32 ppb) 164 { > 165 s64 best_val, val, best_period, period, approx_dev, dif, dif2; 166 struct qed_hwfn *p_hwfn = QED_LEADING_HWFN(cdev); 167 struct qed_ptt *p_ptt = p_hwfn->p_ptp_ptt; 168 u32 drift_ctr_cfg = 0, drift_state; 169 int drift_dir = 1; 170 171 if (ppb < 0) { 172 ppb = -ppb; 173 drift_dir = 0; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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