tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/batch head: b81b17307e02f8e6d4abf87e7ec2d7e5aea1e0b5 commit: 9e645faaf9e6f3027cffe59497005d2fef66550d [6/27] ftrace: Add multi direct register/unregister interface config: riscv-buildonly-randconfig-r006-20210826 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1076082a0d97bd5c16a25ee7cf3dbb6ee4b5a9fe) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=9e645faaf9e6f3027cffe59497005d2fef66550d git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git git fetch --no-tags jolsa-perf bpf/batch git checkout 9e645faaf9e6f3027cffe59497005d2fef66550d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from kernel/sched/core.c:10: In file included from include/trace/events/sched.h:738: In file included from include/trace/define_trace.h:102: In file included from include/trace/trace_events.h:21: In file included from include/linux/trace_events.h:10: In file included from include/linux/perf_event.h:49: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static kernel/sched/core.c:3268:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] struct rq *rq; ^ kernel/sched/core.c:3258:20: warning: unused function 'rq_has_pinned_tasks' [-Wunused-function] static inline bool rq_has_pinned_tasks(struct rq *rq) ^ kernel/sched/core.c:5109:20: warning: unused function 'sched_tick_start' [-Wunused-function] static inline void sched_tick_start(int cpu) { } ^ kernel/sched/core.c:5110:20: warning: unused function 'sched_tick_stop' [-Wunused-function] static inline void sched_tick_stop(int cpu) { } ^ kernel/sched/core.c:5767:20: warning: unused function 'sched_core_cpu_starting' [-Wunused-function] static inline void sched_core_cpu_starting(unsigned int cpu) {} ^ 9 warnings generated. -- In file included from kernel/sched/loadavg.c:9: In file included from kernel/sched/sched.h:50: In file included from include/linux/init_task.h:9: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static 4 warnings generated. -- In file included from kernel/sched/fair.c:23: In file included from kernel/sched/sched.h:50: In file included from include/linux/init_task.h:9: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static kernel/sched/fair.c:591:5: warning: no previous prototype for function 'sched_update_scaling' [-Wmissing-prototypes] int sched_update_scaling(void) ^ kernel/sched/fair.c:591:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int sched_update_scaling(void) ^ static kernel/sched/fair.c:5438:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes] void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ kernel/sched/fair.c:5438:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ static kernel/sched/fair.c:11457:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes] void free_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11457:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void free_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11459:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes] int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ kernel/sched/fair.c:11459:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) ^ static kernel/sched/fair.c:11464:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes] void online_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11464:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void online_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:11466:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes] void unregister_fair_sched_group(struct task_group *tg) { } ^ kernel/sched/fair.c:11466:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void unregister_fair_sched_group(struct task_group *tg) { } ^ static kernel/sched/fair.c:450:20: warning: unused function 'list_del_leaf_cfs_rq' [-Wunused-function] static inline void list_del_leaf_cfs_rq(struct cfs_rq *cfs_rq) ^ kernel/sched/fair.c:2939:20: warning: unused function 'account_numa_enqueue' [-Wunused-function] static inline void account_numa_enqueue(struct rq *rq, struct task_struct *p) ^ kernel/sched/fair.c:2943:20: warning: unused function 'account_numa_dequeue' [-Wunused-function] static inline void account_numa_dequeue(struct rq *rq, struct task_struct *p) ^ kernel/sched/fair.c:2947:20: warning: unused function 'update_scan_period' [-Wunused-function] static inline void update_scan_period(struct task_struct *p, int new_cpu) ^ kernel/sched/fair.c:4110:20: warning: unused function 'cfs_rq_is_decayed' [-Wunused-function] static inline bool cfs_rq_is_decayed(struct cfs_rq *cfs_rq) ^ kernel/sched/fair.c:4124:20: warning: unused function 'remove_entity_load_avg' [-Wunused-function] static inline void remove_entity_load_avg(struct sched_entity *se) {} ^ kernel/sched/fair.c:5419:20: warning: unused function 'sync_throttle' [-Wunused-function] static inline void sync_throttle(struct task_group *tg, int cpu) {} ^ kernel/sched/fair.c:5432:19: warning: unused function 'throttled_lb_pair' [-Wunused-function] static inline int throttled_lb_pair(struct task_group *tg, ^ kernel/sched/fair.c:5444:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function] static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg) ^ kernel/sched/fair.c:5448:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function] static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ kernel/sched/fair.c:5449:20: warning: unused function 'update_runtime_enabled' [-Wunused-function] static inline void update_runtime_enabled(struct rq *rq) {} ^ kernel/sched/fair.c:5450:20: warning: unused function 'unthrottle_offline_cfs_rqs' [-Wunused-function] static inline void unthrottle_offline_cfs_rqs(struct rq *rq) {} ^ 22 warnings generated. -- In file included from kernel/sched/rt.c:6: In file included from kernel/sched/sched.h:50: In file included from include/linux/init_task.h:9: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static kernel/sched/rt.c:253:6: warning: no previous prototype for function 'free_rt_sched_group' [-Wmissing-prototypes] void free_rt_sched_group(struct task_group *tg) { } ^ kernel/sched/rt.c:253:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void free_rt_sched_group(struct task_group *tg) { } ^ static kernel/sched/rt.c:255:5: warning: no previous prototype for function 'alloc_rt_sched_group' [-Wmissing-prototypes] int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent) ^ kernel/sched/rt.c:255:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent) ^ static kernel/sched/rt.c:669:6: warning: no previous prototype for function 'sched_rt_bandwidth_account' [-Wmissing-prototypes] bool sched_rt_bandwidth_account(struct rt_rq *rt_rq) ^ kernel/sched/rt.c:669:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool sched_rt_bandwidth_account(struct rt_rq *rt_rq) ^ static kernel/sched/rt.c:421:20: warning: unused function 'need_pull_rt_task' [-Wunused-function] static inline bool need_pull_rt_task(struct rq *rq, struct task_struct *prev) ^ kernel/sched/rt.c:426:20: warning: unused function 'pull_rt_task' [-Wunused-function] static inline void pull_rt_task(struct rq *this_rq) ^ kernel/sched/rt.c:476:20: warning: unused function 'rt_task_fits_capacity' [-Wunused-function] static inline bool rt_task_fits_capacity(struct task_struct *p, int cpu) ^ kernel/sched/rt.c:1113:6: warning: unused function 'inc_rt_prio_smp' [-Wunused-function] void inc_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio) {} ^ kernel/sched/rt.c:1115:6: warning: unused function 'dec_rt_prio_smp' [-Wunused-function] void dec_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio) {} ^ 12 warnings generated. -- In file included from kernel/sched/deadline.c:18: In file included from kernel/sched/sched.h:50: In file included from include/linux/init_task.h:9: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static kernel/sched/deadline.c:686:20: warning: unused function 'need_pull_dl_task' [-Wunused-function] static inline bool need_pull_dl_task(struct rq *rq, struct task_struct *prev) ^ kernel/sched/deadline.c:691:20: warning: unused function 'pull_dl_task' [-Wunused-function] static inline void pull_dl_task(struct rq *rq) ^ 6 warnings generated. -- In file included from kernel/sched/psi.c:146: In file included from kernel/sched/sched.h:50: In file included from include/linux/init_task.h:9: >> include/linux/ftrace.h:351:41: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ >> include/linux/ftrace.h:351:5: warning: no previous prototype for function 'register_ftrace_direct_multi' [-Wmissing-prototypes] int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ include/linux/ftrace.h:351:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) ^ static include/linux/ftrace.h:355:43: warning: declaration of 'struct ftrace_ops' will not be visible outside of this function [-Wvisibility] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ >> include/linux/ftrace.h:355:5: warning: no previous prototype for function 'unregister_ftrace_direct_multi' [-Wmissing-prototypes] int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ include/linux/ftrace.h:355:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int unregister_ftrace_direct_multi(struct ftrace_ops *ops) ^ static kernel/sched/psi.c:1112:21: warning: no previous prototype for function 'psi_trigger_create' [-Wmissing-prototypes] struct psi_trigger *psi_trigger_create(struct psi_group *group, ^ kernel/sched/psi.c:1112:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct psi_trigger *psi_trigger_create(struct psi_group *group, ^ static kernel/sched/psi.c:1246:6: warning: no previous prototype for function 'psi_trigger_replace' [-Wmissing-prototypes] void psi_trigger_replace(void **trigger_ptr, struct psi_trigger *new) ^ kernel/sched/psi.c:1246:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void psi_trigger_replace(void **trigger_ptr, struct psi_trigger *new) ^ static kernel/sched/psi.c:1258:10: warning: no previous prototype for function 'psi_trigger_poll' [-Wmissing-prototypes] __poll_t psi_trigger_poll(void **trigger_ptr, ^ kernel/sched/psi.c:1258:1: note: declare 'static' if the function is not intended to be used outside of this translation unit __poll_t psi_trigger_poll(void **trigger_ptr, ^ static 7 warnings generated. vim +351 include/linux/ftrace.h 307 308 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS 309 extern int ftrace_direct_func_count; 310 int register_ftrace_direct(unsigned long ip, unsigned long addr); 311 int unregister_ftrace_direct(unsigned long ip, unsigned long addr); 312 int modify_ftrace_direct(unsigned long ip, unsigned long old_addr, unsigned long new_addr); 313 struct ftrace_direct_func *ftrace_find_direct_func(unsigned long addr); 314 int ftrace_modify_direct_caller(struct ftrace_func_entry *entry, 315 struct dyn_ftrace *rec, 316 unsigned long old_addr, 317 unsigned long new_addr); 318 unsigned long ftrace_find_rec_direct(unsigned long ip); 319 int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr); 320 int unregister_ftrace_direct_multi(struct ftrace_ops *ops); 321 #else 322 # define ftrace_direct_func_count 0 323 static inline int register_ftrace_direct(unsigned long ip, unsigned long addr) 324 { 325 return -ENOTSUPP; 326 } 327 static inline int unregister_ftrace_direct(unsigned long ip, unsigned long addr) 328 { 329 return -ENOTSUPP; 330 } 331 static inline int modify_ftrace_direct(unsigned long ip, 332 unsigned long old_addr, unsigned long new_addr) 333 { 334 return -ENOTSUPP; 335 } 336 static inline struct ftrace_direct_func *ftrace_find_direct_func(unsigned long addr) 337 { 338 return NULL; 339 } 340 static inline int ftrace_modify_direct_caller(struct ftrace_func_entry *entry, 341 struct dyn_ftrace *rec, 342 unsigned long old_addr, 343 unsigned long new_addr) 344 { 345 return -ENODEV; 346 } 347 static inline unsigned long ftrace_find_rec_direct(unsigned long ip) 348 { 349 return 0; 350 } > 351 int register_ftrace_direct_multi(struct ftrace_ops *ops, unsigned long addr) 352 { 353 return -ENODEV; 354 } > 355 int unregister_ftrace_direct_multi(struct ftrace_ops *ops) 356 { 357 return -ENODEV; 358 } 359 #endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */ 360 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org