7:12 a.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
netfs-folio-regions
head: 215a4ee495a95cc73256ed76f91cb78bcabd6b8e
commit: aa9c4d14149db8497a57098e64074fb6857fd952 [24/28] netfs: Process pending write
queue
config: hexagon-randconfig-r041-20210818 (attached as .config)
compiler: clang version 12.0.0
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 netfs-folio-regions
git checkout aa9c4d14149db8497a57098e64074fb6857fd952
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
fs/netfs/write_back.c:114:6: warning: variable 'region' is used uninitialized
whenever 'if' condition is false [-Wsometimes-uninitialized]
if (range.start < wreq->coverage.start) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_back.c:129:18: note: uninitialized use occurs here
if (range.end > region->dirty.end) {
^~~~~~
fs/netfs/write_back.c:114:2: note: remove the 'if' if its condition is always
true
if (range.start < wreq->coverage.start) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_back.c:98:35: note: initialize the variable 'region' to silence
this warning
struct netfs_dirty_region *region, *r;
^
= NULL
> fs/netfs/write_back.c:370:3: warning: misleading indentation;
statement is not part of the previous 'if' [-Wmisleading-indentation]
ctx->ops->create_write_operations(wreq);
^
fs/netfs/write_back.c:367:2: note: previous statement is here
if (test_bit(NETFS_WREQ_WRITE_TO_CACHE, &wreq->flags))
^
fs/netfs/write_back.c:420:7: warning: variable 'ret' is used uninitialized
whenever 'if' condition is false [-Wsometimes-uninitialized]
if (!folio_trylock(folio))
^~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_back.c:424:9: note: uninitialized use occurs here
return ret;
^~~
fs/netfs/write_back.c:420:3: note: remove the 'if' if its condition is always
true
if (!folio_trylock(folio))
^~~~~~~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_back.c:407:9: note: initialize the variable 'ret' to silence
this warning
int ret;
^
= 0
fs/netfs/write_back.c:478:20: warning: variable 'region' is uninitialized when
used here [-Wuninitialized]
if (range.start < region->dirty.start) {
^~~~~~
fs/netfs/write_back.c:463:35: note: initialize the variable 'region' to silence
this warning
struct netfs_dirty_region *region, *r;
^
= NULL
fs/netfs/write_back.c:1089:1: error: expected statement
}
^
4 warnings and 1 error generated.
vim +/if +370 fs/netfs/write_back.c
346
347 /*
348 * Process a write request.
349 *
350 * All the folios in the bounding box have had a ref taken on them and those
351 * covering the dirty region have been marked as being written back and their
352 * dirty bits provisionally cleared.
353 */
354 static void netfs_writeback(struct netfs_write_request *wreq)
355 {
356 struct netfs_i_context *ctx = netfs_i_context(wreq->inode);
357
358 kenter("");
359
360 if (test_bit(NETFS_ICTX_ENCRYPTED, &ctx->flags) &&
361 !netfs_prepare_wreq(wreq))
362 goto out;
363
364 /* ->outstanding > 0 carries a ref */
365 netfs_get_write_request(wreq, netfs_wreq_trace_get_for_outstanding);
366
367 if (test_bit(NETFS_WREQ_WRITE_TO_CACHE, &wreq->flags))
368 netfs_set_up_write_to_cache(wreq);
369 //if (wreq->region->type != NETFS_REGION_CACHE_COPY)
370 ctx->ops->create_write_operations(wreq);
371 out:
372 if (atomic_dec_and_test(&wreq->outstanding))
373 netfs_write_completed(wreq, false);
374 }
375
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org