[kbuild-all] [chrome-os:chromeos-5.15 1631/2827] kernel/watchdog.c:250: undefined reference to `watchdog_update_hrtimer_threshold'

tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.15 head: c0df759bbc318d8927514e74bc86380284c7109a commit: df12be153ec235a8f19900408becaaa1d978b792 [1631/2827] CHROMIUM: hardlockup: detect hard lockups without NMIs using secondary cpus config: x86_64-randconfig-a001-20211212 (https://download.01.org/0day-ci/archive/20211214/202112140532.YAoON1jf-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-5.15 git checkout df12be153ec235a8f19900408becaaa1d978b792 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: kernel/watchdog.o: in function `set_sample_period': vim +250 kernel/watchdog.c 58687acba59266 Don Zickus 2010-05-07 239 0f34c400914f16 Chuansheng Liu 2012-12-17 240 static void set_sample_period(void) 58687acba59266 Don Zickus 2010-05-07 241 { 58687acba59266 Don Zickus 2010-05-07 242 /* 586692a5a5fc57 Mandeep Singh Baines 2011-05-22 243 * convert watchdog_thresh from seconds to ns 86f5e6a7b19272 Fernando Luis Vázquez Cao 2012-02-09 244 * the divide by 5 is to give hrtimer several chances (two 86f5e6a7b19272 Fernando Luis Vázquez Cao 2012-02-09 245 * or three with the current relation between the soft 86f5e6a7b19272 Fernando Luis Vázquez Cao 2012-02-09 246 * and hard thresholds) to increment before the 86f5e6a7b19272 Fernando Luis Vázquez Cao 2012-02-09 247 * hardlockup detector generates a warning 58687acba59266 Don Zickus 2010-05-07 248 */ 0f34c400914f16 Chuansheng Liu 2012-12-17 249 sample_period = get_softlockup_thresh() * ((u64)NSEC_PER_SEC / 5); 7edaeb6841dfb2 Thomas Gleixner 2017-08-15 @250 watchdog_update_hrtimer_threshold(sample_period); 58687acba59266 Don Zickus 2010-05-07 251 } 58687acba59266 Don Zickus 2010-05-07 252 :::::: The code at line 250 was first introduced by commit :::::: 7edaeb6841dfb27e362288ab8466ebdc4972e867 kernel/watchdog: Prevent false positives with turbo modes :::::: TO: Thomas Gleixner <tglx(a)linutronix.de&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org