tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: ed9bff77568b702badeef2b7c7776bb93d993768 commit: a91091aed1fa925eef3085facb44c4826b317f39 [2784/2784] sched: More flexible use of CPU quota when CPU is idle config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20250828/202508282129.EDKxrS6o-lkp@i...) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250828/202508282129.EDKxrS6o-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508282129.EDKxrS6o-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

arch/arm64/kernel/idle.c:51:5: warning: no previous prototype for function 'is_sibling_idle' [-Wmissing-prototypes] 51 | int is_sibling_idle(void) | ^ arch/arm64/kernel/idle.c:51:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 51 | int is_sibling_idle(void) | ^ | static 1 warning generated. -- kernel/sched/fair.c:7235:6: warning: no previous prototype for function 'free_affinity_domains' [-Wmissing-prototypes] 7235 | void free_affinity_domains(struct affinity_domain *ad) | ^ kernel/sched/fair.c:7235:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 7235 | void free_affinity_domains(struct affinity_domain *ad) | ^ | static kernel/sched/fair.c:15430:12: warning: no previous prototype for function 'is_sibling_idle' [-Wmissing-prototypes] 15430 | int __weak is_sibling_idle(void) | ^ kernel/sched/fair.c:15430:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 15430 | int __weak is_sibling_idle(void) | ^ | static kernel/sched/fair.c:730:19: warning: unused function 'max_vruntime' [-Wunused-function] 730 | static inline u64 max_vruntime(u64 max_vruntime, u64 vruntime) | ^~~~~~~~~~~~ 3 warnings generated.

vim +/is_sibling_idle +51 arch/arm64/kernel/idle.c 50

51 int is_sibling_idle(void) 52 { 53 return this_cpu_read(sibling_idle); 54 } 55

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