Hi Vitaly, [auto build test WARNING on linus/master] [also build test WARNING on v4.10-rc4 next-20170119] [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/Vitaly-Kuznetsov/hv_util-adjust-system-time-smoothly/20170120-011342 config: x86_64-rhel (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=x86_64 All warnings (new ones prefixed by >>): drivers/hv/hv_util.c: In function 'hv_timesync_init': >> drivers/hv/hv_util.c:561:36: warning: passing argument 1 of 'ptp_clock_register' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] hv_ptp_clock = ptp_clock_register(&ptp_hyperv_info, NULL); ^ In file included from drivers/hv/hv_util.c:30:0: include/linux/ptp_clock_kernel.h:172:26: note: expected 'struct ptp_clock_info *' but argument is of type 'const struct ptp_clock_info *' extern struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, ^~~~~~~~~~~~~~~~~~ vim +561 drivers/hv/hv_util.c 545 .gettime64 = hv_ptp_gettime, 546 .settime64 = hv_ptp_settime, 547 .owner = THIS_MODULE, 548 }; 549 550 static struct ptp_clock *hv_ptp_clock; 551 552 static int hv_timesync_init(struct hv_util_service *srv) 553 { 554 INIT_WORK(&wrk.work, hv_set_host_time); 555 556 /* 557 * ptp_clock_register() returns NULL when CONFIG_PTP_1588_CLOCK is 558 * disabled but the driver is still useful without the PTP device 559 * as it still handles the ICTIMESYNCFLAG_SYNC case. 560 */ > 561 hv_ptp_clock = ptp_clock_register(&ptp_hyperv_info, NULL); 562 if (IS_ERR_OR_NULL(hv_ptp_clock)) { 563 pr_err("cannot register PTP clock: %ld\n", 564 PTR_ERR(hv_ptp_clock)); 565 hv_ptp_clock = NULL; 566 } 567 568 return 0; 569 } --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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