[openeuler:OLK-6.6 3541/3541] kernel/livepatch/core.c:97:12: warning: no previous prototype for function 'arch_klp_init_func'

[kernel test robot <lkp@intel.com>]

Hi Zheng,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   cd9eb9b4365b71652b2c2ac58293bea47c9f9302
commit: eabc33c6f2c91168537f10e9275b0921c9f78c45 [3541/3541] livepatch/ppc64: Implement livepatch without ftrace for ppc64be
config: arm64-randconfig-001-20251212 (https://download.01.org/0day-ci/archive/20251215/202512150621.RknROZUX-lkp@intel.com/config)
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/20251215/202512150621.RknROZUX-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512150621.RknROZUX-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:1756:12: warning: no previous prototype for function 'arch_klp_check_activeness_func' [-Wmissing-prototypes]
    1756 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable,
         |            ^
   kernel/livepatch/core.c:1756:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1756 | int __weak arch_klp_check_activeness_func(struct klp_func *func, int enable,
         | ^
         | static 
   kernel/livepatch/core.c:2011:14: warning: no previous prototype for function 'arch_klp_mem_alloc' [-Wmissing-prototypes]
    2011 | void __weak *arch_klp_mem_alloc(size_t size)
         |              ^
   kernel/livepatch/core.c:2011:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2011 | void __weak *arch_klp_mem_alloc(size_t size)
         | ^
         | static 
   kernel/livepatch/core.c:2016:13: warning: no previous prototype for function 'arch_klp_mem_free' [-Wmissing-prototypes]
    2016 | void __weak arch_klp_mem_free(void *mem)
         |             ^
   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_mem_free(void *mem)
         | ^
         | static 
   kernel/livepatch/core.c:2021:13: warning: no previous prototype for function 'arch_klp_code_modify_prepare' [-Wmissing-prototypes]
    2021 | void __weak arch_klp_code_modify_prepare(void)
         |             ^
   kernel/livepatch/core.c:2021:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2021 | void __weak arch_klp_code_modify_prepare(void)
         | ^
         | static 
   kernel/livepatch/core.c:2025:13: warning: no previous prototype for function 'arch_klp_code_modify_post_process' [-Wmissing-prototypes]
    2025 | void __weak arch_klp_code_modify_post_process(void)
         |             ^
   kernel/livepatch/core.c:2025:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2025 | void __weak arch_klp_code_modify_post_process(void)
         | ^
         | static 
   kernel/livepatch/core.c:2038:12: warning: no previous prototype for function 'arch_klp_check_breakpoint' [-Wmissing-prototypes]
    2038 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         |            ^
   kernel/livepatch/core.c:2038:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2038 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         | ^
         | static 
   kernel/livepatch/core.c:2052:13: warning: no previous prototype for function 'arch_klp_set_brk_func' [-Wmissing-prototypes]
    2052 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func)
         |             ^
   kernel/livepatch/core.c:2052:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    2052 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func)
         | ^
         | static 
   8 warnings generated.


vim +/arch_klp_init_func +97 kernel/livepatch/core.c

    96	
  > 97	int __weak arch_klp_init_func(struct klp_object *obj, struct klp_func *func)
    98	{
    99		return 0;
   100	}
   101	#endif /* CONFIG_LIVEPATCH_FTRACE */
   102	

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