Hi Zheng, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: cd9eb9b4365b71652b2c2ac58293bea47c9f9302 commit: 470628a716984e1325b92bef4fa2140ff5a062a5 [3541/3541] livepatch: Use breakpoint exception to optimize enabling livepatch config: arm64-randconfig-001-20251212 (https://download.01.org/0day-ci/archive/20251215/202512150445.9iffkH6B-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/20251215/202512150445.9iffkH6B-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/202512150445.9iffkH6B-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/livepatch/core.c:1728:12: warning: no previous prototype for function 'arch_klp_check_activeness_func' [-Wmissing-prototypes] 1728 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable, | ^ kernel/livepatch/core.c:1728:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1728 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable, | ^ | static kernel/livepatch/core.c:1983:14: warning: no previous prototype for function 'arch_klp_mem_alloc' [-Wmissing-prototypes] 1983 | void __weak *arch_klp_mem_alloc(size_t size) | ^ kernel/livepatch/core.c:1983:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1983 | void __weak *arch_klp_mem_alloc(size_t size) | ^ | static kernel/livepatch/core.c:1988:13: warning: no previous prototype for function 'arch_klp_mem_free' [-Wmissing-prototypes] 1988 | void __weak arch_klp_mem_free(void *mem) | ^ kernel/livepatch/core.c:1988:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1988 | void __weak arch_klp_mem_free(void *mem) | ^ | static kernel/livepatch/core.c:1993:13: warning: no previous prototype for function 'arch_klp_code_modify_prepare' [-Wmissing-prototypes] 1993 | void __weak arch_klp_code_modify_prepare(void) | ^ kernel/livepatch/core.c:1993:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1993 | void __weak arch_klp_code_modify_prepare(void) | ^ | static kernel/livepatch/core.c:1997:13: warning: no previous prototype for function 'arch_klp_code_modify_post_process' [-Wmissing-prototypes] 1997 | void __weak arch_klp_code_modify_post_process(void) | ^ kernel/livepatch/core.c:1997:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1997 | void __weak arch_klp_code_modify_post_process(void) | ^ | static
kernel/livepatch/core.c:2006:12: warning: no previous prototype for function 'arch_klp_check_breakpoint' [-Wmissing-prototypes] 2006 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ kernel/livepatch/core.c:2006:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2006 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ | static kernel/livepatch/core.c:2011:12: warning: no previous prototype for function 'arch_klp_add_breakpoint' [-Wmissing-prototypes] 2011 | int __weak arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ kernel/livepatch/core.c:2011:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2011 | int __weak arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ | static kernel/livepatch/core.c:2016:13: warning: no previous prototype for function 'arch_klp_remove_breakpoint' [-Wmissing-prototypes] 2016 | void __weak arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ kernel/livepatch/core.c:2016:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2016 | void __weak arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func) | ^ | static kernel/livepatch/core.c:2020:13: warning: no previous prototype for function 'arch_klp_set_brk_func' [-Wmissing-prototypes] 2020 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func) | ^ kernel/livepatch/core.c:2020:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 2020 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func) | ^ | static 9 warnings generated.
vim +/arch_klp_check_breakpoint +2006 kernel/livepatch/core.c 2005
2006 int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func) 2007 { 2008 return 0; 2009 } 2010 2011 int __weak arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func) 2012 { 2013 return -EOPNOTSUPP; 2014 } 2015 2016 void __weak arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func) 2017 { 2018 } 2019 2020 void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func) 2021 { 2022 func_node->brk_func = new_func; 2023 } 2024
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