Re: [RFC PATCH v3 30/37] fuse: Provide registration functions for fuse-bpf

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

Hi Daniel,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on 49859de997c3115b85544bce6b6ceab60a7fabc4]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Rosenberg/bpf-verifier-Accept-dynptr-mem-as-mem-in-herlpers/20230418-094717
base:   49859de997c3115b85544bce6b6ceab60a7fabc4
patch link:    https://lore.kernel.org/r/20230418014037.2412394-31-drosen%40google.com
patch subject: [RFC PATCH v3 30/37] fuse: Provide registration functions for fuse-bpf
config: x86_64-randconfig-a012-20230417 (https://download.01.org/0day-ci/archive/20230418/202304181216.vm8kB0N7-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/ff2c02ca675655ec88e525c51defda64d7774b0d
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Daniel-Rosenberg/bpf-verifier-Accept-dynptr-mem-as-mem-in-herlpers/20230418-094717
        git checkout ff2c02ca675655ec88e525c51defda64d7774b0d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304181216.vm8kB0N7-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/fuse/dev.c:9:
>> fs/fuse/fuse_i.h:1400:5: warning: no previous prototype for function 'init_fuse_bpf' [-Wmissing-prototypes]
   int init_fuse_bpf(void)
       ^
   fs/fuse/fuse_i.h:1400:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int init_fuse_bpf(void)
   ^
   static 
>> fs/fuse/fuse_i.h:1404:6: warning: no previous prototype for function 'uninit_fuse_bpf' [-Wmissing-prototypes]
   void uninit_fuse_bpf(void)
        ^
   fs/fuse/fuse_i.h:1404:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void uninit_fuse_bpf(void)
   ^
   static 
>> fs/fuse/fuse_i.h:1407:18: warning: no previous prototype for function 'find_fuse_ops' [-Wmissing-prototypes]
   struct fuse_ops *find_fuse_ops(const char *key)
                    ^
   fs/fuse/fuse_i.h:1407:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct fuse_ops *find_fuse_ops(const char *key)
   ^
   static 
>> fs/fuse/fuse_i.h:1411:18: warning: no previous prototype for function 'get_fuse_ops' [-Wmissing-prototypes]
   struct fuse_ops *get_fuse_ops(struct fuse_ops *ops)
                    ^
   fs/fuse/fuse_i.h:1411:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct fuse_ops *get_fuse_ops(struct fuse_ops *ops)
   ^
   static 
>> fs/fuse/fuse_i.h:1415:6: warning: no previous prototype for function 'put_fuse_ops' [-Wmissing-prototypes]
   void put_fuse_ops(struct fuse_ops *ops)
        ^
   fs/fuse/fuse_i.h:1415:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void put_fuse_ops(struct fuse_ops *ops)
   ^
   static 
   5 warnings generated.


vim +/init_fuse_bpf +1400 fs/fuse/fuse_i.h

  1385	
  1386	struct fuse_file *fuse_file_open(struct fuse_mount *fm, u64 nodeid,
  1387					 unsigned int open_flags, bool isdir,
  1388					 struct file *file);
  1389	void fuse_file_release(struct inode *inode, struct fuse_file *ff,
  1390			       unsigned int open_flags, fl_owner_t id, bool isdir);
  1391	
  1392	/* backing.c */
  1393	#ifdef CONFIG_FUSE_BPF
  1394	struct fuse_ops *find_fuse_ops(const char *key);
  1395	struct fuse_ops *get_fuse_ops(struct fuse_ops *ops);
  1396	void put_fuse_ops(struct fuse_ops *ops);
  1397	int init_fuse_bpf(void);
  1398	void uninit_fuse_bpf(void);
  1399	#else
> 1400	int init_fuse_bpf(void)
  1401	{
  1402		return -EOPNOTSUPP;
  1403	}
> 1404	void uninit_fuse_bpf(void)
  1405	{
  1406	}
> 1407	struct fuse_ops *find_fuse_ops(const char *key)
  1408	{
  1409		return NULL;
  1410	}
> 1411	struct fuse_ops *get_fuse_ops(struct fuse_ops *ops)
  1412	{
  1413		return NULL;
  1414	}
> 1415	void put_fuse_ops(struct fuse_ops *ops)
  1416	{
  1417	}
  1418	#endif
  1419	

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