[kbuild-all] [dhowells-fs:fscache-iter-3 2/8] fs/fscache/io.c:200:9: warning: variable 'len' set but not used

tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter-3 head: 3af24cee1e80003b6c8993fa8a601cc0ab9fd6c6 commit: b5606e77b36d6218ef5367fcdbebcbfa1af091bc [2/8] fscache: Implement an alternate I/O interface to replace the old API config: i386-randconfig-r005-20210915 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # 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-3 git checkout b5606e77b36d6218ef5367fcdbebcbfa1af091bc # save the attached .config to linux build tree make W=1 ARCH=i386 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:164:5: warning: no previous prototype for '__fscache_deprecated_read_page' [-Wmissing-prototypes] 164 | int __fscache_deprecated_read_page(struct fscache_cookie *cookie, struct page *page) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/fscache/io.c:194:5: warning: no previous prototype for '__fscache_deprecated_write_page' [-Wmissing-prototypes] 194 | int __fscache_deprecated_write_page(struct fscache_cookie *cookie, struct page *page) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/fscache/io.c: In function '__fscache_deprecated_write_page': 200 | size_t len; | ^~~ 199 | loff_t start; | ^~~~~ vim +/len +200 fs/fscache/io.c 190 191 /* 192 * Deprecated page writing interface. 193 */ 194 int __fscache_deprecated_write_page(struct fscache_cookie *cookie, struct page *page) 195 { 196 struct netfs_cache_resources cres; 197 struct iov_iter iter; 198 struct bio_vec bvec[1]; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org