[PATCH bpf-next v3 2/4] bpf: Implement bpf_local_storage for inodes

[kernel test robot]

Hi KP,

I love your patch! Perhaps something to improve:

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

url:    https://github.com/0day-ci/linux/commits/KP-Singh/Generalizing-bpf_local_storage/20200709-085810
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> kernel/bpf/bpf_inode_storage.c:274:17: warning: no previous prototype for 'inode_storage_map_alloc' [-Wmissing-prototypes]
     274 | struct bpf_map *inode_storage_map_alloc(union bpf_attr *attr)
         |                 ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/bpf/bpf_inode_storage.c:286:6: warning: no previous prototype for 'inode_storage_map_free' [-Wmissing-prototypes]
     286 | void inode_storage_map_free(struct bpf_map *map)
         |      ^~~~~~~~~~~~~~~~~~~~~~

vim +/inode_storage_map_alloc +274 kernel/bpf/bpf_inode_storage.c

   273	
 > 274	struct bpf_map *inode_storage_map_alloc(union bpf_attr *attr)
   275	{
   276		struct bpf_local_storage_map *smap;
   277	
   278		smap = bpf_local_storage_map_alloc(attr);
   279		if (IS_ERR(smap))
   280			return ERR_CAST(smap);
   281	
   282		smap->cache_idx = cache_idx_get_inode();
   283		return &smap->map;
   284	}
   285	
 > 286	void inode_storage_map_free(struct bpf_map *map)
   287	{
   288		struct bpf_local_storage_map *smap;
   289	
   290		smap = (struct bpf_local_storage_map *)map;
   291		cache_idx_free_inode(smap->cache_idx);
   292		bpf_local_storage_map_free(smap);
   293	}
   294	

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0-DAY CI Kernel Test Service, Intel Corporation
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