kernel/sched/fair.c:8894:20: warning: stack frame size of 1072 bytes in function 'update_sd_lb_stats'

From: kernel test robot
Date: Thu Mar 04 2021 - 00:10:20 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f69d02e37a85645aa90d18cacfff36dba370f797
commit: 8b3165e54566e8bb8f4b7d4e5f12ced78ce462bb MIPS: Enable GCOV
date: 3 months ago
config: mips-randconfig-r036-20210304 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project eec7f8f7b1226be422a76542cb403d02538f453a)
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 mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8b3165e54566e8bb8f4b7d4e5f12ced78ce462bb
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 8b3165e54566e8bb8f4b7d4e5f12ced78ce462bb
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips

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:5368:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes]
void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
kernel/sched/fair.c:5368:1: 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:11129:6: 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:11129:1: 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:11131:5: 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:11131:1: 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:11136:6: 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:11136:1: 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:11138:6: 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:11138:1: 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:486:20: 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:5349:20: warning: unused function 'sync_throttle' [-Wunused-function]
static inline void sync_throttle(struct task_group *tg, int cpu) {}
^
kernel/sched/fair.c:5374:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function]
static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg)
^
kernel/sched/fair.c:5378:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function]
static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
^
kernel/sched/fair.c:8190:19: warning: unused function 'check_misfit_status' [-Wunused-function]
static inline int check_misfit_status(struct rq *rq, struct sched_domain *sd)
^
>> kernel/sched/fair.c:8894:20: warning: stack frame size of 1072 bytes in function 'update_sd_lb_stats' [-Wframe-larger-than=]
static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sds)
^
kernel/sched/fair.c:5932:19: warning: stack frame size of 1048 bytes in function 'find_idlest_cpu' [-Wframe-larger-than=]
static inline int find_idlest_cpu(struct sched_domain *sd, struct task_struct *p,
^
12 warnings generated.


vim +/update_sd_lb_stats +8894 kernel/sched/fair.c

57abff067a0848 kernel/sched/fair.c Vincent Guittot 2019-10-18 8887
1e3c88bdeb1260 kernel/sched_fair.c Peter Zijlstra 2009-12-17 8888 /**
461819ac8ee950 kernel/sched_fair.c Hui Kang 2011-10-11 8889 * update_sd_lb_stats - Update sched_domain's statistics for load balancing.
cd96891d48a945 kernel/sched/fair.c Randy Dunlap 2012-06-08 8890 * @env: The load balancing environment.
1e3c88bdeb1260 kernel/sched_fair.c Peter Zijlstra 2009-12-17 8891 * @sds: variable to hold the statistics for this sched_domain.
1e3c88bdeb1260 kernel/sched_fair.c Peter Zijlstra 2009-12-17 8892 */
0b0695f2b34a4a kernel/sched/fair.c Vincent Guittot 2019-10-18 8893
0ec8aa00f2b4dc kernel/sched/fair.c Peter Zijlstra 2013-10-07 @8894 static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sds)
1e3c88bdeb1260 kernel/sched_fair.c Peter Zijlstra 2009-12-17 8895 {
bd939f45da24e2 kernel/sched/fair.c Peter Zijlstra 2012-05-02 8896 struct sched_domain *child = env->sd->child;
bd939f45da24e2 kernel/sched/fair.c Peter Zijlstra 2012-05-02 8897 struct sched_group *sg = env->sd->groups;
05b40e05773481 kernel/sched/fair.c Srikar Dronamraju 2017-03-22 8898 struct sg_lb_stats *local = &sds->local_stat;
56cf515b4b1567 kernel/sched/fair.c Joonsoo Kim 2013-08-06 8899 struct sg_lb_stats tmp_sgs;
630246a06ae2a7 kernel/sched/fair.c Quentin Perret 2018-12-03 8900 int sg_status = 0;
1e3c88bdeb1260 kernel/sched_fair.c Peter Zijlstra 2009-12-17 8901

:::::: The code at line 8894 was first introduced by commit
:::::: 0ec8aa00f2b4dc457836ef4e2662b02483e94fb7 sched/numa: Avoid migrating tasks that are placed on their preferred node

:::::: TO: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxxxxx>

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

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