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Subject[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/commit/?id=b5606e77b36d6218ef5367fcdbebcbfa1af091bc
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@intel.com>

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':
>> fs/fscache/io.c:200:9: warning: variable 'len' set but not used [-Wunused-but-set-variable]
200 | size_t len;
| ^~~
>> fs/fscache/io.c:199:9: warning: variable 'start' set but not used [-Wunused-but-set-variable]
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];
> 199 loff_t start;
> 200 size_t len;

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