Re: [PATCH bpf-next 08/13] bpf: move subprog call logic back to verifier.c

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

Hi Andrii,

kernel test robot noticed the following build warnings:

[auto build test WARNING on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Andrii-Nakryiko/bpf-log-PTR_TO_MEM-memory-size-in-verifier-log/20231205-074451
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20231204233931.49758-9-andrii%40kernel.org
patch subject: [PATCH bpf-next 08/13] bpf: move subprog call logic back to verifier.c
config: x86_64-randconfig-004-20231205 (https://download.01.org/0day-ci/archive/20231205/202312051900.XRWfHJW0-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312051900.XRWfHJW0-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/202312051900.XRWfHJW0-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/bpf/verifier.c:5083:5: warning: no previous prototype for function 'check_ptr_off_reg' [-Wmissing-prototypes]
   int check_ptr_off_reg(struct bpf_verifier_env *env,
       ^
   kernel/bpf/verifier.c:5083:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int check_ptr_off_reg(struct bpf_verifier_env *env,
   ^
   static 
>> kernel/bpf/verifier.c:7268:5: warning: no previous prototype for function 'check_mem_reg' [-Wmissing-prototypes]
   int check_mem_reg(struct bpf_verifier_env *env, struct bpf_reg_state *reg,
       ^
   kernel/bpf/verifier.c:7268:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int check_mem_reg(struct bpf_verifier_env *env, struct bpf_reg_state *reg,
   ^
   static 
>> kernel/bpf/verifier.c:8254:5: warning: no previous prototype for function 'check_func_arg_reg_off' [-Wmissing-prototypes]
   int check_func_arg_reg_off(struct bpf_verifier_env *env,
       ^
   kernel/bpf/verifier.c:8254:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int check_func_arg_reg_off(struct bpf_verifier_env *env,
   ^
   static 
   3 warnings generated.


vim +/check_ptr_off_reg +5083 kernel/bpf/verifier.c

e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5082  
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15 @5083  int check_ptr_off_reg(struct bpf_verifier_env *env,
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5084  		      const struct bpf_reg_state *reg, int regno)
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5085  {
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5086  	return __check_ptr_off_reg(env, reg, regno, false);
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5087  }
e9147b4422e1f3 Kumar Kartikeya Dwivedi 2022-04-15  5088  

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