Re: [PATCH bpf-next 6/7] bpf: introduce bpf_mem_alloc_size()

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

Hi Yafang,

Thank you for the patch! Perhaps something to improve:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Yafang-Shao/mm-percpu-fix-incorrect-size-in-pcpu_obj_full_size/20230202-094352
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20230202014158.19616-7-laoar.shao%40gmail.com
patch subject: [PATCH bpf-next 6/7] bpf: introduce bpf_mem_alloc_size()
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230202/202302021258.By6JZK71-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/996f3e2ac4dca054396d0f37ffe8ddb97fc4212f
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yafang-Shao/mm-percpu-fix-incorrect-size-in-pcpu_obj_full_size/20230202-094352
        git checkout 996f3e2ac4dca054396d0f37ffe8ddb97fc4212f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash kernel/bpf/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> kernel/bpf/memalloc.c:227:15: warning: no previous prototype for 'bpf_mem_cache_size' [-Wmissing-prototypes]
     227 | unsigned long bpf_mem_cache_size(struct bpf_mem_cache *c, void *obj)
         |               ^~~~~~~~~~~~~~~~~~


vim +/bpf_mem_cache_size +227 kernel/bpf/memalloc.c

   226	
 > 227	unsigned long bpf_mem_cache_size(struct bpf_mem_cache *c, void *obj)
   228	{
   229		unsigned long size;
   230	
   231		if (!obj)
   232			return 0;
   233	
   234		if (c->percpu_size) {
   235			size = percpu_size(((void **)obj)[1]);
   236			size += ksize(obj);
   237			return size;
   238		}
   239	
   240		return ksize(obj);
   241	}
   242	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests