[openeuler:OLK-5.10 2544/2544] kernel/livepatch/core.c:1420:13: warning: no previous prototype for function 'arch_klp_set_brk_func'

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

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   220bfa0ea761db9406a3cfde3064aa029e829221
commit: b25272c022a17ee12688d001375e7a483385c568 [2544/2544] livepatch: Use breakpoint exception to optimize enabling livepatch
config: x86_64-randconfig-123-20241205 (https://download.01.org/0day-ci/archive/20241206/202412060504.AIlPmrzd-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241206/202412060504.AIlPmrzd-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/202412060504.AIlPmrzd-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/livepatch/core.c:16:
   In file included from include/linux/kallsyms.h:12:
   In file included from include/linux/mm.h:1557:
   include/linux/vmstat.h:431:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     431 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   kernel/livepatch/core.c:70:16: warning: no previous prototype for function 'klp_check_patch_kprobed' [-Wmissing-prototypes]
      70 | struct kprobe *klp_check_patch_kprobed(struct klp_patch *patch)
         |                ^
   kernel/livepatch/core.c:70:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      70 | struct kprobe *klp_check_patch_kprobed(struct klp_patch *patch)
         | ^
         | static 
   kernel/livepatch/core.c:941:12: warning: no previous prototype for function 'arch_klp_func_can_patch' [-Wmissing-prototypes]
     941 | int __weak arch_klp_func_can_patch(struct klp_func *func)
         |            ^
   kernel/livepatch/core.c:941:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     941 | int __weak arch_klp_func_can_patch(struct klp_func *func)
         | ^
         | static 
   kernel/livepatch/core.c:946:12: warning: no previous prototype for function 'arch_klp_init_func' [-Wmissing-prototypes]
     946 | int __weak arch_klp_init_func(struct klp_object *obj, struct klp_func *func)
         |            ^
   kernel/livepatch/core.c:946:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     946 | int __weak arch_klp_init_func(struct klp_object *obj, struct klp_func *func)
         | ^
         | static 
   kernel/livepatch/core.c:1349:5: warning: no previous prototype for function 'klp_try_disable_patch' [-Wmissing-prototypes]
    1349 | int klp_try_disable_patch(void *data)
         |     ^
   kernel/livepatch/core.c:1349:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1349 | int klp_try_disable_patch(void *data)
         | ^
         | static 
   kernel/livepatch/core.c:1383:13: warning: no previous prototype for function 'arch_klp_code_modify_prepare' [-Wmissing-prototypes]
    1383 | void __weak arch_klp_code_modify_prepare(void)
         |             ^
   kernel/livepatch/core.c:1383:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1383 | void __weak arch_klp_code_modify_prepare(void)
         | ^
         | static 
   kernel/livepatch/core.c:1387:13: warning: no previous prototype for function 'arch_klp_code_modify_post_process' [-Wmissing-prototypes]
    1387 | void __weak arch_klp_code_modify_post_process(void)
         |             ^
   kernel/livepatch/core.c:1387:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1387 | void __weak arch_klp_code_modify_post_process(void)
         | ^
         | static 
   kernel/livepatch/core.c:1391:14: warning: no previous prototype for function 'arch_klp_mem_alloc' [-Wmissing-prototypes]
    1391 | void __weak *arch_klp_mem_alloc(size_t size)
         |              ^
   kernel/livepatch/core.c:1391:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1391 | void __weak *arch_klp_mem_alloc(size_t size)
         | ^
         | static 
   kernel/livepatch/core.c:1396:13: warning: no previous prototype for function 'arch_klp_mem_free' [-Wmissing-prototypes]
    1396 | void __weak arch_klp_mem_free(void *mem)
         |             ^
   kernel/livepatch/core.c:1396:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1396 | void __weak arch_klp_mem_free(void *mem)
         | ^
         | static 
   kernel/livepatch/core.c:1406:12: warning: no previous prototype for function 'arch_klp_check_breakpoint' [-Wmissing-prototypes]
    1406 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         |            ^
   kernel/livepatch/core.c:1406:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1406 | int __weak arch_klp_check_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         | ^
         | static 
   kernel/livepatch/core.c:1411:12: warning: no previous prototype for function 'arch_klp_add_breakpoint' [-Wmissing-prototypes]
    1411 | int __weak arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         |            ^
   kernel/livepatch/core.c:1411:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1411 | int __weak arch_klp_add_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         | ^
         | static 
   kernel/livepatch/core.c:1416:13: warning: no previous prototype for function 'arch_klp_remove_breakpoint' [-Wmissing-prototypes]
    1416 | void __weak arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         |             ^
   kernel/livepatch/core.c:1416:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1416 | void __weak arch_klp_remove_breakpoint(struct arch_klp_data *arch_data, void *old_func)
         | ^
         | static 
>> kernel/livepatch/core.c:1420:13: warning: no previous prototype for function 'arch_klp_set_brk_func' [-Wmissing-prototypes]
    1420 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func)
         |             ^
   kernel/livepatch/core.c:1420:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1420 | void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func)
         | ^
         | static 
   kernel/livepatch/core.c:1809:5: warning: no previous prototype for function 'klp_try_enable_patch' [-Wmissing-prototypes]
    1809 | int klp_try_enable_patch(void *data)
         |     ^
   kernel/livepatch/core.c:1809:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1809 | int klp_try_enable_patch(void *data)
         | ^
         | static 
   14 warnings generated.


vim +/arch_klp_set_brk_func +1420 kernel/livepatch/core.c

  1419	
> 1420	void __weak arch_klp_set_brk_func(struct klp_func_node *func_node, void *new_func)
  1421	{
  1422		func_node->brk_func = new_func;
  1423	}
  1424	

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