[chao:bugfix/syzbot 5/5] fs/f2fs/xattr.h:156:13: warning: 'f2fs_destroy_xattr_cache' defined but not used

[chao:bugfix/syzbot 5/5] fs/f2fs/xattr.h:156:13: warning: 'f2fs_destroy_xattr_cache' defined but not used

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot
head:   519a1cbfb1f287de5edded596f01a41af0cf25ec
commit: 519a1cbfb1f287de5edded596f01a41af0cf25ec [5/5] f2fs: use global inline_xattr_slab instead of per-sb slab cache
config: sparc-randconfig-002-20251013 (https://download.01.org/0day-ci/archive/20251014/202510140134.TvEMgTHM-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251014/202510140134.TvEMgTHM-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/202510140134.TvEMgTHM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/f2fs/file.c:31:
>> fs/f2fs/xattr.h:156:13: warning: 'f2fs_destroy_xattr_cache' defined but not used [-Wunused-function]
    static void f2fs_destroy_xattr_cache(void) { }
                ^~~~~~~~~~~~~~~~~~~~~~~~
>> fs/f2fs/xattr.h:155:19: warning: 'f2fs_init_xattr_cache' defined but not used [-Wunused-function]
    static int __init f2fs_init_xattr_cache(void) { return 0; }
                      ^~~~~~~~~~~~~~~~~~~~~


vim +/f2fs_destroy_xattr_cache +156 fs/f2fs/xattr.h

   140	
   141	#define f2fs_xattr_handlers	NULL
   142	#define f2fs_listxattr		NULL
   143	static inline int f2fs_setxattr(struct inode *inode, int index,
   144			const char *name, const void *value, size_t size,
   145			struct folio *folio, int flags)
   146	{
   147		return -EOPNOTSUPP;
   148	}
   149	static inline int f2fs_getxattr(struct inode *inode, int index,
   150				const char *name, void *buffer,
   151				size_t buffer_size, struct folio *dfolio)
   152	{
   153		return -EOPNOTSUPP;
   154	}
 > 155	static int __init f2fs_init_xattr_cache(void) { return 0; }
 > 156	static void f2fs_destroy_xattr_cache(void) { }
   157	#endif
   158	

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