[dhowells-fs:fscache-iter 69/75] fs/fscache/io.c:335:25: warning: variable 'object' set but not used

[dhowells-fs:fscache-iter 69/75] fs/fscache/io.c:335:25: warning: variable 'object' set but not used

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter
head:   5493a885b6784d683ee7b4d40be8c56f3ad23939
commit: 1053796bbbf2ef3d84557d5f9c75edb96910e6d2 [69/75] netfs: Add a helper to pre-read from/to the cache in write_begin
config: c6x-randconfig-r013-20201103 (attached as .config)
compiler: c6x-elf-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
        # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=1053796bbbf2ef3d84557d5f9c75edb96910e6d2
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs fscache-iter
        git checkout 1053796bbbf2ef3d84557d5f9c75edb96910e6d2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x 

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

All warnings (new ones prefixed by >>):

   fs/fscache/io.c: In function 'fscache_write_to_cache':
>> fs/fscache/io.c:335:25: warning: variable 'object' set but not used [-Wunused-but-set-variable]
     335 |  struct fscache_object *object;
         |                         ^~~~~~

vim +/object +335 fs/fscache/io.c

   304	
   305	/**
   306	 * fscache_write_to_cache - Save a write to the cache and clear PG_fscache
   307	 * @cookie: The cookie representing the cache object
   308	 * @mapping: The netfs inode to use as the source
   309	 * @start: The start position in @mapping
   310	 * @len: The amount of data to write back
   311	 * @i_size: The new size of the inode
   312	 * @term_func: The function to call upon completion
   313	 * @term_func_priv: The private data for @term_func
   314	 *
   315	 * Helper function for a netfs to write dirty data from an inode into the cache
   316	 * object that's backing it.
   317	 *
   318	 * @start and @len describe the range of the data.  This does not need to be
   319	 * page-aligned, but to satisfy DIO requirements, the cache may expand it up to
   320	 * the page boundaries on either end.  All the pages covering the range must be
   321	 * marked with PG_fscache.
   322	 *
   323	 * If given, @term_func will be called upon completion and supplied with
   324	 * @term_func_priv.  Note that the PG_fscache flags will have been cleared by
   325	 * this point, so the netfs must retain its own pin on the mapping.
   326	 */
   327	void fscache_write_to_cache(struct fscache_cookie *cookie,
   328				    struct address_space *mapping,
   329				    loff_t start, size_t len, loff_t i_size,
   330				    fscache_io_terminated_t term_func,
   331				    void *term_func_priv)
   332	{
   333		struct fscache_write_request *wreq;
   334		struct fscache_op_resources *opr;
 > 335		struct fscache_object *object;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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