[kbuild-all] [mcgrof-next:20211123-sysctl-cleanups 41/41] kernel/kprobes.c:2605:9: error: implicit declaration of function 'kprobe_sysctls_init'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20211123-sysctl-cleanups head: c18add41d859b4feec081eab6cfd624a5642973d commit: c18add41d859b4feec081eab6cfd624a5642973d [41/41] kprobe: move sysctl_kprobes_optimization to kprobes.c config: arc-randconfig-r025-20211123 (https://download.01.org/0day-ci/archive/20211125/202111250249.S7EcX00x-lk...) compiler: arc-elf-gcc (GCC) 11.2.0 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/mcgrof/linux-next.git/com... git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git git fetch --no-tags mcgrof-next 20211123-sysctl-cleanups git checkout c18add41d859b4feec081eab6cfd624a5642973d # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 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 >>): kernel/kprobes.c: In function 'init_kprobes': 2605 | kprobe_sysctls_init(); | ^~~~~~~~~~~~~~~~~~~ In file included from include/linux/perf_event.h:25, from kernel/kprobes.c:41: At top level: arch/arc/include/asm/perf_event.h:126:27: warning: 'arc_pmu_cache_map' defined but not used [-Wunused-const-variable=] 126 | static const unsigned int 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[] = { | ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/kprobe_sysctls_init +2605 kernel/kprobes.c 2597 2598 err = arch_init_kprobes(); 2599 if (!err) 2600 err = register_die_notifier(&kprobe_exceptions_nb); 2601 if (!err) 2602 err = register_module_notifier(&kprobe_module_nb); 2603 2604 kprobes_initialized = (err == 0); 2606 return err; 2607 } 2608 early_initcall(init_kprobes); 2609 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org