tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 53e06f2de559bde769638c9608dcb8654a535654 commit: e75a4c08437638a8e81dec82074225e3c9551735 [5509/5515] Remove abs64() config: x86_64-allnoconfig (attached as .config) reproduce: git checkout e75a4c08437638a8e81dec82074225e3c9551735 # save the attached .config to linux build tree make ARCH=x86_64 Note: the linux-next/master HEAD 53e06f2de559bde769638c9608dcb8654a535654 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): kernel/time/clocksource.c: In function 'clocksource_watchdog': >> kernel/time/clocksource.c:220:7: error: implicit declaration of function 'abs64' [-Werror=implicit-function-declaration] if (abs64(cs_nsec - wd_nsec) > WATCHDOG_THRESHOLD) { ^ cc1: some warnings being treated as errors vim +/abs64 +220 kernel/time/clocksource.c b52f52a0 Thomas Gleixner 2007-05-09 204 3a978377 Thomas Gleixner 2014-07-16 205 delta = clocksource_delta(wdnow, cs->wd_last, watchdog->mask); 3a978377 Thomas Gleixner 2014-07-16 206 wd_nsec = clocksource_cyc2ns(delta, watchdog->mult, 3a978377 Thomas Gleixner 2014-07-16 207 watchdog->shift); b5199515 Thomas Gleixner 2011-06-16 208 3a978377 Thomas Gleixner 2014-07-16 209 delta = clocksource_delta(csnow, cs->cs_last, cs->mask); 3a978377 Thomas Gleixner 2014-07-16 210 cs_nsec = clocksource_cyc2ns(delta, cs->mult, cs->shift); 0b046b21 John Stultz 2015-03-11 211 wdlast = cs->wd_last; /* save these in case we print them */ 0b046b21 John Stultz 2015-03-11 212 cslast = cs->cs_last; b5199515 Thomas Gleixner 2011-06-16 213 cs->cs_last = csnow; b5199515 Thomas Gleixner 2011-06-16 214 cs->wd_last = wdnow; b5199515 Thomas Gleixner 2011-06-16 215 9fb60336 Thomas Gleixner 2011-09-12 216 if (atomic_read(&watchdog_reset_pending)) 9fb60336 Thomas Gleixner 2011-09-12 217 continue; 9fb60336 Thomas Gleixner 2011-09-12 218 b5199515 Thomas Gleixner 2011-06-16 219 /* Check the deviation from the watchdog clocksource. */ 67dfae0c John Stultz 2015-09-14 @220 if (abs64(cs_nsec - wd_nsec) > WATCHDOG_THRESHOLD) { 45bbfe64 Joe Perches 2015-05-25 221 pr_warn("timekeeping watchdog: Marking clocksource '%s' as unstable because the skew is too large:\n", 45bbfe64 Joe Perches 2015-05-25 222 cs->name); 0b046b21 John Stultz 2015-03-11 223 pr_warn(" '%s' wd_now: %llx wd_last: %llx mask: %llx\n", 0b046b21 John Stultz 2015-03-11 224 watchdog->name, wdnow, wdlast, watchdog->mask); 0b046b21 John Stultz 2015-03-11 225 pr_warn(" '%s' cs_now: %llx cs_last: %llx mask: %llx\n", 0b046b21 John Stultz 2015-03-11 226 cs->name, csnow, cslast, cs->mask); 0b046b21 John Stultz 2015-03-11 227 __clocksource_unstable(cs); 8cf4e750 Martin Schwidefsky 2009-08-14 228 continue; :::::: The code at line 220 was first introduced by commit :::::: 67dfae0cd72fec5cd158b6e5fb1647b7dbe0834c clocksource: Fix abs() usage w/ 64bit values :::::: TO: John Stultz <john.stultz@xxxxxxxxxx> :::::: CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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