Hi laokz, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: cd9eb9b4365b71652b2c2ac58293bea47c9f9302 commit: b8f3220637be1736c165c289c634f27841ac4e01 [3541/3541] livepatch: add arch hook before doing klp_resolve_symbols config: arm64-randconfig-001-20251212 (https://download.01.org/0day-ci/archive/20251215/202512150919.EC4St0LR-lkp@i...) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251215/202512150919.EC4St0LR-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/202512150919.EC4St0LR-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/livepatch/core.c:97:12: warning: no previous prototype for function 'arch_klp_init_func' [-Wmissing-prototypes] 97 | int __weak arch_klp_init_func(struct klp_object *obj, struct klp_func *func) | ^ kernel/livepatch/core.c:97:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 97 | int __weak arch_klp_init_func(struct klp_object *obj, struct klp_func *func) | ^ | static

...

kernel/livepatch/core.c:216:13: warning: no previous prototype for function 'arch_klp_skip_resolve' [-Wmissing-prototypes] 216 | bool __weak arch_klp_skip_resolve(unsigned int type) | ^ kernel/livepatch/core.c:216:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 216 | bool __weak arch_klp_skip_resolve(unsigned int type) | ^ | static kernel/livepatch/core.c:1767:12: warning: no previous prototype for function 'arch_klp_check_activeness_func' [-Wmissing-prototypes] 1767 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable, | ^ kernel/livepatch/core.c:1767:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1767 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable, | ^ | static kernel/livepatch/core.c:2022:14: warning: no previous prototype for function 'arch_klp_mem_alloc' [-Wmissing-prototypes] 2022 | void __weak *arch_klp_mem_alloc(size_t size) | ^ kernel/livepatch/core.c:2022:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2022 | void __weak *arch_klp_mem_alloc(size_t size) | ^ | static kernel/livepatch/core.c:2027:13: warning: no previous prototype for function 'arch_klp_mem_free' [-Wmissing-prototypes] 2027 | void __weak arch_klp_mem_free(void *mem) | ^ kernel/livepatch/core.c:2027:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2027 | void __weak arch_klp_mem_free(void *mem) | ^ | static kernel/livepatch/core.c:2032:13: warning: no previous prototype for function 'arch_klp_code_modify_prepare' [-Wmissing-prototypes] 2032 | void __weak arch_klp_code_modify_prepare(void) | ^ kernel/livepatch/core.c:2032:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2032 | void __weak arch_klp_code_modify_prepare(void) | ^ | static kernel/livepatch/core.c:2036:13: warning: no previous prototype for function 'arch_klp_code_modify_post_process' [-Wmissing-prototypes] 2036 | void __weak arch_klp_code_modify_post_process(void) | ^ kernel/livepatch/core.c:2036:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2036 | void __weak arch_klp_code_modify_post_process(void) | ^ | static kernel/livepatch/core.c:2049:12: warning: no previous prototype for function 'arch_klp_check_breakpoint' [-Wmissing-prototypes] 2049 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ kernel/livepatch/core.c:2049:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2049 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ | static kernel/livepatch/core.c:2063:13: warning: no previous prototype for function 'arch_klp_set_brk_func' [-Wmissing-prototypes] 2063 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func) | ^ kernel/livepatch/core.c:2063:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2063 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func) | ^ | static 9 warnings generated.

vim +/arch_klp_skip_resolve +216 kernel/livepatch/core.c 214 215 #ifdef CONFIG_LIVEPATCH_WO_FTRACE

216 bool __weak arch_klp_skip_resolve(unsigned int type) 217 { 218 return false; 219 } 220 #endif 221

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