Hi Byungchul, kernel test robot noticed the following build warnings: [auto build test WARNING on 0dd3ee31125508cd67f7e7172247f05b7fd1753a] url: https://github.com/intel-lab-lkp/linux/commits/Byungchul-Park/x86-tlb-Add-APIs-manipulating-tlb-batch-s-arch-data/20240115-162220 base: 0dd3ee31125508cd67f7e7172247f05b7fd1753a patch link: https://lore.kernel.org/r/20240115081953.2521-7-byungchul%40sk.com patch subject: [PATCH v6 6/7] mm: Defer TLB flush by keeping both src and dst folios at migration config: arm-defconfig (https://download.01.org/0day-ci/archive/20240116/202401160823.I1JCYXT5-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240116/202401160823.I1JCYXT5-lkp@xxxxxxxxx/reproduce) 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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202401160823.I1JCYXT5-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/arm/kernel/asm-offsets.c:12: >> include/linux/mm.h:2046:43: warning: declaration of 'struct arch_tlbflush_unmap_batch' will not be visible outside of this function [-Wvisibility] static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {} ^ 1 warning generated. -- In file included from kernel/sched/core.c:9: In file included from include/linux/highmem.h:8: In file included from include/linux/cacheflush.h:5: In file included from arch/arm/include/asm/cacheflush.h:10: >> include/linux/mm.h:2046:43: warning: declaration of 'struct arch_tlbflush_unmap_batch' will not be visible outside of this function [-Wvisibility] static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {} ^ kernel/sched/core.c:6500:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function] static inline void sched_core_cpu_deactivate(unsigned int cpu) {} ^ 2 warnings generated. -- In file included from kernel/sched/fair.c:27: In file included from include/linux/mm_api.h:1: >> include/linux/mm.h:2046:43: warning: declaration of 'struct arch_tlbflush_unmap_batch' will not be visible outside of this function [-Wvisibility] static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {} ^ kernel/sched/fair.c:13041:6: 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:13041:1: 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:13043:5: 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:13043:1: 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:13048:6: 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:13048:1: 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:13050:6: 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:13050:1: 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:488:20: 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:509:19: warning: unused function 'tg_is_idle' [-Wunused-function] static inline int tg_is_idle(struct task_group *tg) ^ kernel/sched/fair.c:533:19: warning: unused function 'max_vruntime' [-Wunused-function] static inline u64 max_vruntime(u64 max_vruntime, u64 vruntime) ^ kernel/sched/fair.c:6518:20: warning: unused function 'cfs_bandwidth_used' [-Wunused-function] static inline bool cfs_bandwidth_used(void) ^ kernel/sched/fair.c:6526:20: warning: unused function 'sync_throttle' [-Wunused-function] static inline void sync_throttle(struct task_group *tg, int cpu) {} ^ kernel/sched/fair.c:6550:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function] static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg) ^ kernel/sched/fair.c:6554:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function] static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} ^ 12 warnings generated. -- In file included from arch/arm/kernel/asm-offsets.c:12: >> include/linux/mm.h:2046:43: warning: declaration of 'struct arch_tlbflush_unmap_batch' will not be visible outside of this function [-Wvisibility] static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {} ^ 1 warning generated. vim +2046 include/linux/mm.h 2040 2041 #if defined(CONFIG_MIGRATION) && defined(CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH) 2042 extern void migrc_flush_start(void); 2043 extern void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch); 2044 #else 2045 static inline void migrc_flush_start(void) {} > 2046 static inline void migrc_flush_end(struct arch_tlbflush_unmap_batch *arch) {} 2047 #endif 2048 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
