Hi Song, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on linus/master v6.4-rc2 next-20230517] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Song-Liu/watchdog-Allow-nmi-watchdog-to-use-ref-cycles-event/20230518-015450 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230517175105.1614575-1-song%40kernel.org patch subject: [PATCH v3] watchdog: Allow nmi watchdog to use "ref-cycles" event config: um-i386_defconfig compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/c119f335899443fe6ba4c91b295b469e2793712f git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Song-Liu/watchdog-Allow-nmi-watchdog-to-use-ref-cycles-event/20230518-015450 git checkout c119f335899443fe6ba4c91b295b469e2793712f # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=i386 olddefconfig make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202305180435.gh1msXbz-lkp@intel.com/ All errors (new ones prefixed by >>): ld: kernel/panic.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/cpu.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/workqueue.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/sched/core.o: in function `hardlockup_config_perf_event': kernel/sched/core.c:2148: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/sched/build_utility.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/printk/printk.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/time/timekeeping.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/time/timer_list.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/time/tick-common.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: kernel/time/tick-sched.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: mm/mm_init.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: mm/page_alloc.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: drivers/tty/sysrq.o: in function `hardlockup_config_perf_event': >> include/linux/nmi.h:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here ld: lib/nmi_backtrace.o: in function `hardlockup_config_perf_event': lib/nmi_backtrace.c:112: multiple definition of `hardlockup_config_perf_event'; init/main.o:include/linux/nmi.h:112: first defined here vim +112 include/linux/nmi.h 96 97 #if defined(CONFIG_HARDLOCKUP_DETECTOR_PERF) 98 extern void arch_touch_nmi_watchdog(void); 99 extern void hardlockup_detector_perf_stop(void); 100 extern void hardlockup_detector_perf_restart(void); 101 extern void hardlockup_detector_perf_disable(void); 102 extern void hardlockup_detector_perf_enable(void); 103 extern void hardlockup_detector_perf_cleanup(void); 104 extern int hardlockup_detector_perf_init(void); 105 extern void hardlockup_config_perf_event(const char *str); 106 #else 107 static inline void hardlockup_detector_perf_stop(void) { } 108 static inline void hardlockup_detector_perf_restart(void) { } 109 static inline void hardlockup_detector_perf_disable(void) { } 110 static inline void hardlockup_detector_perf_enable(void) { } 111 static inline void hardlockup_detector_perf_cleanup(void) { } > 112 extern void hardlockup_config_perf_event(const char *str) { } 113 # if !defined(CONFIG_HAVE_NMI_WATCHDOG) 114 static inline int hardlockup_detector_perf_init(void) { return -ENODEV; } 115 static inline void arch_touch_nmi_watchdog(void) {} 116 # else 117 static inline int hardlockup_detector_perf_init(void) { return 0; } 118 # endif 119 #endif 120 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki