[kbuild-all] [dhowells-fs:fscache-iter-2 57/68] fs/fscache/io.c:235: warning: expecting prototype for fscache_clear_page_bits(). Prototype was for __fscache_clear_page_bits() instead

tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter-2 head: d45090b191774b11ecfe2421f5619827aa08ad00 commit: e29afe6f941d92e05bfaf15c9fcb4fbc4760244f [57/68] fscache: Add support for writing to the cache config: m68k-buildonly-randconfig-r005-20210712 (attached as .config) compiler: m68k-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 # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/com... 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-2 git checkout e29afe6f941d92e05bfaf15c9fcb4fbc4760244f # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash drivers/nvme/target/ fs/fscache/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): fs/fscache/io.c:25: warning: Function parameter or member 'cres' not described in 'fscache_wait_for_operation' fs/fscache/io.c:25: warning: Excess function parameter 'cookie' description in 'fscache_wait_for_operation' vim +235 fs/fscache/io.c 223 224 /** 225 * fscache_clear_page_bits - Clear the PG_fscache bits from a set of pages 226 * @mapping: The netfs inode to use as the source 227 * @start: The start position in @mapping 228 * @len: The amount of data to unlock 229 * 230 * Clear the PG_fscache flag from a sequence of pages and wake up anyone who's 231 * waiting. 232 */ 233 void __fscache_clear_page_bits(struct address_space *mapping, 234 loff_t start, size_t len) 236 pgoff_t first = start / PAGE_SIZE; 237 pgoff_t last = (start + len - 1) / PAGE_SIZE; 238 struct page *page; 239 240 if (len) { 241 XA_STATE(xas, &mapping->i_pages, first); 242 243 rcu_read_lock(); 244 xas_for_each(&xas, page, last) { 245 end_page_fscache(page); 246 } 247 rcu_read_unlock(); 248 } 249 } 250 EXPORT_SYMBOL(__fscache_clear_page_bits); 251 252 /* 253 * Deal with the completion of writing the data to the cache. 254 */ 255 static void fscache_wreq_done(void *priv, ssize_t transferred_or_error, 256 bool was_async) 257 { 258 struct fscache_write_request *wreq = priv; 259 260 fscache_clear_page_bits(wreq->mapping, wreq->start, wreq->len); 261 262 if (wreq->term_func) 263 wreq->term_func(wreq->term_func_priv, transferred_or_error, 264 was_async); 265 fscache_end_operation(&wreq->cache_resources); 266 kfree(wreq); 267 } 268 269 /** 270 * fscache_write_to_cache - Save a write to the cache and clear PG_fscache 271 * @cookie: The cookie representing the cache object 272 * @mapping: The netfs inode to use as the source 273 * @start: The start position in @mapping 274 * @len: The amount of data to write back 275 * @i_size: The new size of the inode 276 * @term_func: The function to call upon completion 277 * @term_func_priv: The private data for @term_func 278 * 279 * Helper function for a netfs to write dirty data from an inode into the cache 280 * object that's backing it. 281 * 282 * @start and @len describe the range of the data. This does not need to be 283 * page-aligned, but to satisfy DIO requirements, the cache may expand it up to 284 * the page boundaries on either end. All the pages covering the range must be 285 * marked with PG_fscache. 286 * 287 * If given, @term_func will be called upon completion and supplied with 288 * @term_func_priv. Note that the PG_fscache flags will have been cleared by 289 * this point, so the netfs must retain its own pin on the mapping. 290 */ 291 void __fscache_write_to_cache(struct fscache_cookie *cookie, 292 struct address_space *mapping, 293 loff_t start, size_t len, loff_t i_size, 294 netfs_io_terminated_t term_func, 295 void *term_func_priv) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org