kernel/sched/fair.c:637:5: warning: no previous prototype for function 'sched_update_scaling'

From: kernel test robot
Date: Tue Sep 28 2021 - 06:00:46 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0513e464f9007b70b96740271a948ca5ab6e7dd7
commit: 8a99b6833c884fa0e7919030d93fecedc69fc625 sched: Move SCHED_DEBUG sysctl to debugfs
date: 6 months ago
config: i386-randconfig-a014-20210927 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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/torvalds/linux.git/commit/?id=8a99b6833c884fa0e7919030d93fecedc69fc625
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 8a99b6833c884fa0e7919030d93fecedc69fc625
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> kernel/sched/fair.c:637:5: warning: no previous prototype for function 'sched_update_scaling' [-Wmissing-prototypes]
int sched_update_scaling(void)
^
kernel/sched/fair.c:637:1: 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:5395:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes]
void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
kernel/sched/fair.c:5395:1: 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:11217:6: 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:11217:1: 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:11219:5: 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:11219:1: 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:11224:6: 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:11224:1: 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:11226:6: 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:11226:1: 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:496:20: 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:2972:20: 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:2976:20: 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:2980:20: 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:4087:20: warning: unused function 'remove_entity_load_avg' [-Wunused-function]
static inline void remove_entity_load_avg(struct sched_entity *se) {}
^
kernel/sched/fair.c:5376:20: warning: unused function 'sync_throttle' [-Wunused-function]
static inline void sync_throttle(struct task_group *tg, int cpu) {}
^
kernel/sched/fair.c:5389:19: warning: unused function 'throttled_lb_pair' [-Wunused-function]
static inline int throttled_lb_pair(struct task_group *tg,
^
kernel/sched/fair.c:5401:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function]
static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg)
^
kernel/sched/fair.c:5405:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function]
static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
kernel/sched/fair.c:5406:20: warning: unused function 'update_runtime_enabled' [-Wunused-function]
static inline void update_runtime_enabled(struct rq *rq) {}
^
kernel/sched/fair.c:5407:20: warning: unused function 'unthrottle_offline_cfs_rqs' [-Wunused-function]
static inline void unthrottle_offline_cfs_rqs(struct rq *rq) {}
^
17 warnings generated.


vim +/sched_update_scaling +637 kernel/sched/fair.c

632
633 /**************************************************************
634 * Scheduling class statistics methods:
635 */
636
> 637 int sched_update_scaling(void)
638 {
639 unsigned int factor = get_update_sysctl_factor();
640
641 sched_nr_latency = DIV_ROUND_UP(sysctl_sched_latency,
642 sysctl_sched_min_granularity);
643

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip