tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.07.27b head: 11e66439ec35a4e59ab0bafdc33b56f395cc3b49 commit: fe900dbb9ac6756870dd5241bdcdd44770f23a93 [32/57] EXP cpu: CPU-hotplug progress checks config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 10.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=fe900dbb9ac6756870dd5241bdcdd44770f23a93 git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git git fetch --no-tags rcu dev.2021.07.27b git checkout fe900dbb9ac6756870dd5241bdcdd44770f23a93 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> kernel/cpu.c:135:6: error: redefinition of 'cpu_hp_start_now' 135 | void cpu_hp_start_now(void) | ^~~~~~~~~~~~~~~~ In file included from kernel/cpu.c:17: include/linux/cpu.h:147:20: note: previous definition of 'cpu_hp_start_now' was here 147 | static inline void cpu_hp_start_now(void) { } | ^~~~~~~~~~~~~~~~ >> kernel/cpu.c:144:6: error: redefinition of 'cpu_hp_stop_now' 144 | void cpu_hp_stop_now(void) | ^~~~~~~~~~~~~~~ In file included from kernel/cpu.c:17: include/linux/cpu.h:148:20: note: previous definition of 'cpu_hp_stop_now' was here 148 | static inline void cpu_hp_stop_now(void) { } | ^~~~~~~~~~~~~~~ kernel/cpu.c:150:6: error: redefinition of 'cpu_hp_check_delay' 150 | void cpu_hp_check_delay(const char *s, void *func) | ^~~~~~~~~~~~~~~~~~ In file included from kernel/cpu.c:17: include/linux/cpu.h:149:20: note: previous definition of 'cpu_hp_check_delay' was here 149 | static inline void cpu_hp_check_delay(const char *s, void *func) { } | ^~~~~~~~~~~~~~~~~~ In file included from include/linux/printk.h:11, from include/linux/kernel.h:19, from include/linux/sched/mm.h:5, from kernel/cpu.c:6: kernel/cpu.c: In function 'cpu_hp_check_delay': kernel/cpu.c:161:41: warning: integer overflow in expression of type 'long int' results in '1215752192' [-Woverflow] 161 | if (WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "%s %ps took %llu milliseconds\n", s, func, (t1 - t) / NSEC_PER_MSEC)) | ^ include/linux/once_lite.h:15:27: note: in definition of macro 'DO_ONCE_LITE_IF' 15 | bool __ret_do_once = !!(condition); \ | ^~~~~~~~~ kernel/cpu.c:161:6: note: in expansion of macro 'WARN_ONCE' 161 | if (WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "%s %ps took %llu milliseconds\n", s, func, (t1 - t) / NSEC_PER_MSEC)) | ^~~~~~~~~ kernel/cpu.c:161:16: note: in expansion of macro 'time_after64' 161 | if (WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "%s %ps took %llu milliseconds\n", s, func, (t1 - t) / NSEC_PER_MSEC)) | ^~~~~~~~~~~~ kernel/cpu.c: In function 'cpuhp_up_callbacks': kernel/cpu.c:731:37: warning: integer overflow in expression of type 'long int' results in '1215752192' [-Woverflow] 731 | WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "CPU-hotplug notifier %s took %llu milliseconds\n", __func__, (t1 - t) / NSEC_PER_MSEC); | ^ include/linux/once_lite.h:15:27: note: in definition of macro 'DO_ONCE_LITE_IF' 15 | bool __ret_do_once = !!(condition); \ | ^~~~~~~~~ kernel/cpu.c:731:2: note: in expansion of macro 'WARN_ONCE' 731 | WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "CPU-hotplug notifier %s took %llu milliseconds\n", __func__, (t1 - t) / NSEC_PER_MSEC); | ^~~~~~~~~ kernel/cpu.c:731:12: note: in expansion of macro 'time_after64' 731 | WARN_ONCE(time_after64(t1, t + 100 * NSEC_PER_SEC), "CPU-hotplug notifier %s took %llu milliseconds\n", __func__, (t1 - t) / NSEC_PER_MSEC); | ^~~~~~~~~~~~ In file included from include/linux/perf_event.h:25, from include/linux/trace_events.h:10, from include/trace/events/power.h:12, from kernel/cpu.c:37: At top level: arch/arc/include/asm/perf_event.h:126:23: warning: 'arc_pmu_cache_map' defined but not used [-Wunused-const-variable=] 126 | static const unsigned arc_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { | ^~~~~~~~~~~~~~~~~ arch/arc/include/asm/perf_event.h:91:27: warning: 'arc_pmu_ev_hw_map' defined but not used [-Wunused-const-variable=] 91 | static const char * const arc_pmu_ev_hw_map[] = { | ^~~~~~~~~~~~~~~~~ vim +/cpu_hp_start_now +135 kernel/cpu.c 134 > 135 void cpu_hp_start_now(void) 136 { 137 // if (jiffies < 9 * HZ) 138 // return; 139 // WARN_ON_ONCE(cpu_hp_start_time_valid); 140 WRITE_ONCE(cpu_hp_start_time, ktime_get_mono_fast_ns()); 141 smp_store_release(&cpu_hp_start_time_valid, true); 142 } 143 > 144 void cpu_hp_stop_now(void) 145 { 146 // WARN_ON_ONCE(!cpu_hp_start_time_valid && jiffies > 10 * HZ); 147 smp_store_release(&cpu_hp_start_time_valid, false); 148 } 149 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org