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Subject[dhowells-fs:fscache-iter-3 2/8] fs/fscache/io.c:164:5: warning: no previous prototype for '__fscache_fallback_read_page'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter-3
head: ae753cf3639743fb4c3d6e04a40b8f7ff7208ec4
commit: b5cd0254309847abfb2eebfbcbd4415d61c5af1b [2/8] fscache: Implement a fallback I/O interface to replace the old API
config: riscv-randconfig-r042-20210916 (attached as .config)
compiler: riscv32-linux-gcc (GCC) 11.2.0
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=b5cd0254309847abfb2eebfbcbd4415d61c5af1b
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 b5cd0254309847abfb2eebfbcbd4415d61c5af1b
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=riscv

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_fallback_read_page' [-Wmissing-prototypes]
164 | int __fscache_fallback_read_page(struct fscache_cookie *cookie, struct page *page)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> fs/fscache/io.c:194:5: warning: no previous prototype for '__fscache_fallback_write_page' [-Wmissing-prototypes]
194 | int __fscache_fallback_write_page(struct fscache_cookie *cookie, struct page *page)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fscache/io.c: In function '__fscache_fallback_write_page':
fs/fscache/io.c:200:16: warning: variable 'len' set but not used [-Wunused-but-set-variable]
200 | size_t len;
| ^~~
fs/fscache/io.c:199:16: warning: variable 'start' set but not used [-Wunused-but-set-variable]
199 | loff_t start;
| ^~~~~


vim +/__fscache_fallback_read_page +164 fs/fscache/io.c

160
161 /*
162 * Fallback page reading interface.
163 */
> 164 int __fscache_fallback_read_page(struct fscache_cookie *cookie, struct page *page)
165 {
166 struct netfs_cache_resources cres;
167 struct iov_iter iter;
168 struct bio_vec bvec[1];
169 int ret;
170
171 _enter("%lx", page->index);
172
173 memset(&cres, 0, sizeof(cres));
174 bvec[0].bv_page = page;
175 bvec[0].bv_offset = 0;
176 bvec[0].bv_len = PAGE_SIZE;
177 iov_iter_bvec(&iter, READ, bvec, ARRAY_SIZE(bvec), PAGE_SIZE);
178
179 ret = fscache_begin_read_operation(&cres, cookie);
180 if (ret < 0)
181 return ret;
182
183 ret = fscache_read(&cres, page_offset(page), &iter, NETFS_READ_HOLE_FAIL,
184 NULL, NULL);
185 fscache_end_operation(&cres);
186 _leave(" = %d", ret);
187 return ret;
188 }
189 EXPORT_SYMBOL(__fscache_fallback_read_page);
190
191 /*
192 * Fallback page writing interface.
193 */
> 194 int __fscache_fallback_write_page(struct fscache_cookie *cookie, struct page *page)

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