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SubjectRe: [PATCH] afs: Fix afs_write_end() when called with copied == 0 [ver #2]
Hi David,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on linux/master v5.10-rc3 next-20201113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/David-Howells/afs-Fix-afs_write_end-when-called-with-copied-0-ver-2/20201115-012626
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f01c30de86f1047e9bae1b1b1417b0ce8dcd15b1
config: microblaze-randconfig-r022-20201115 (attached as .config)
compiler: microblaze-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://github.com/0day-ci/linux/commit/3486f1e413fba9587ced6c768d75e993ef78ce9d
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review David-Howells/afs-Fix-afs_write_end-when-called-with-copied-0-ver-2/20201115-012626
git checkout 3486f1e413fba9587ced6c768d75e993ef78ce9d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze

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

All errors (new ones prefixed by >>):

fs/afs/write.c: In function 'afs_write_end':
>> fs/afs/write.c:202:3: error: implicit declaration of function 'SetPageUptoodate'; did you mean 'SetPageUptodate'? [-Werror=implicit-function-declaration]
202 | SetPageUptoodate(page);
| ^~~~~~~~~~~~~~~~
| SetPageUptodate
cc1: some warnings being treated as errors

vim +202 fs/afs/write.c

158
159 /*
160 * finalise part of a write to a page
161 */
162 int afs_write_end(struct file *file, struct address_space *mapping,
163 loff_t pos, unsigned len, unsigned copied,
164 struct page *page, void *fsdata)
165 {
166 struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
167 struct key *key = afs_file_key(file);
168 unsigned long priv;
169 unsigned int f, from = pos & (PAGE_SIZE - 1);
170 unsigned int t, to = from + copied;
171 loff_t i_size, maybe_i_size;
172 int ret = 0;
173
174 _enter("{%llx:%llu},{%lx}",
175 vnode->fid.vid, vnode->fid.vnode, page->index);
176
177 if (copied == 0)
178 goto out;
179
180 maybe_i_size = pos + copied;
181
182 i_size = i_size_read(&vnode->vfs_inode);
183 if (maybe_i_size > i_size) {
184 write_seqlock(&vnode->cb_lock);
185 i_size = i_size_read(&vnode->vfs_inode);
186 if (maybe_i_size > i_size)
187 i_size_write(&vnode->vfs_inode, maybe_i_size);
188 write_sequnlock(&vnode->cb_lock);
189 }
190
191 if (!PageUptodate(page)) {
192 if (copied < len) {
193 /* Try and load any missing data from the server. The
194 * unmarshalling routine will take care of clearing any
195 * bits that are beyond the EOF.
196 */
197 ret = afs_fill_page(vnode, key, pos + copied,
198 len - copied, page);
199 if (ret < 0)
200 goto out;
201 }
> 202 SetPageUptoodate(page);
203 }
204
205 if (PagePrivate(page)) {
206 priv = page_private(page);
207 f = afs_page_dirty_from(priv);
208 t = afs_page_dirty_to(priv);
209 if (from < f)
210 f = from;
211 if (to > t)
212 t = to;
213 priv = afs_page_dirty(f, t);
214 set_page_private(page, priv);
215 trace_afs_page_dirty(vnode, tracepoint_string("dirty+"),
216 page->index, priv);
217 } else {
218 priv = afs_page_dirty(from, to);
219 attach_page_private(page, (void *)priv);
220 trace_afs_page_dirty(vnode, tracepoint_string("dirty"),
221 page->index, priv);
222 }
223
224 set_page_dirty(page);
225 if (PageDirty(page))
226 _debug("dirtied");
227 ret = copied;
228
229 out:
230 unlock_page(page);
231 put_page(page);
232 return ret;
233 }
234

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