Hi Damien, I love your patch! Perhaps something to improve: [auto build test WARNING on block/for-next][also build test WARNING on scsi/for-next mkp-scsi/for-next v5.14-rc2 next-20210723]
[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/Damien-Le-Moal/Initial-support-for-multi-actuator-HDDs/20210723-092320 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
:::::: branch date: 26 hours ago :::::: commit date: 26 hours ago config: x86_64-randconfig-c001-20210723 (attached as .config)compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9625ca5b602616b2f5584e8a49ba93c52c141e40)
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
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
#
https://github.com/0day-ci/linux/commit/5bede30cfe0b7db2174fbf8393a311fb21baa66a
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review
Damien-Le-Moal/Initial-support-for-multi-actuator-HDDs/20210723-092320
git checkout 5bede30cfe0b7db2174fbf8393a311fb21baa66a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
clang-analyzer warnings: (new ones prefixed by >>)
^~~~~~~~~~~~
fs/fs-writeback.c:1198:6: note: Left side of '||' is false
if (!skip_if_busy || !writeback_in_progress(&bdi->wb)) {
^
fs/fs-writeback.c:1198:23: note: Assuming the condition is true
if (!skip_if_busy || !writeback_in_progress(&bdi->wb)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fs-writeback.c:1198:2: note: Taking true branch
if (!skip_if_busy || !writeback_in_progress(&bdi->wb)) {
^
fs/fs-writeback.c:1200:3: note: Calling 'wb_queue_work'
wb_queue_work(&bdi->wb, base_work);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fs-writeback.c:163:6: note: Assuming field 'done' is null
if (work->done)
^~~~~~~~~~
fs/fs-writeback.c:163:2: note: Taking false branch
if (work->done)
^
fs/fs-writeback.c:168:6: note: Assuming the condition is false
if (test_bit(WB_registered, &wb->state)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fs-writeback.c:168:2: note: Taking false branch
if (test_bit(WB_registered, &wb->state)) {
^
fs/fs-writeback.c:172:3: note: Calling 'finish_writeback_work'
finish_writeback_work(wb, work);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fs-writeback.c:147:6: note: Assuming field 'auto_free' is not
equal to 0
if (work->auto_free)
^~~~~~~~~~~~~~~
fs/fs-writeback.c:147:2: note: Taking true branch
if (work->auto_free)
^
fs/fs-writeback.c:148:3: note: Argument to kfree() is the address of
the local variable 'work', which is not memory allocated by malloc()
kfree(work);
^ ~~~~
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers.
Use -system-headers to display errors from system headers as well.
2 warnings generated. Suppressed 2 warnings (2 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated. Suppressed 2 warnings (2 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated. Suppressed 2 warnings (2 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated. Suppressed 4 warnings (4 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
block/blk-cranges.c:206:32: warning: Access to field 'nr_ranges' results in a dereference of a null pointer (loaded from variable 'new') [clang-analyzer-core.NullDereference]
if (!old || old->nr_ranges != new->nr_ranges)
^
block/blk-cranges.c:251:19: note: Assuming 'cr' is non-null
if (WARN_ON_ONCE(cr && !cr->nr_ranges)) {
^
include/asm-generic/bug.h:104:25: note: expanded from macro
'WARN_ON_ONCE'
int __ret_warn_on = !!(condition); \
^~~~~~~~~
block/blk-cranges.c:251:19: note: Left side of '&&' is true
if (WARN_ON_ONCE(cr && !cr->nr_ranges)) {
^
block/blk-cranges.c:251:25: note: Assuming field 'nr_ranges' is not
equal to 0
if (WARN_ON_ONCE(cr && !cr->nr_ranges)) {
^
include/asm-generic/bug.h:104:25: note: expanded from macro
'WARN_ON_ONCE'
int __ret_warn_on = !!(condition); \
^~~~~~~~~
block/blk-cranges.c:251:6: note: Taking false branch
if (WARN_ON_ONCE(cr && !cr->nr_ranges)) {
^
include/asm-generic/bug.h:105:2: note: expanded from macro
'WARN_ON_ONCE'
if (unlikely(__ret_warn_on)) \
^
block/blk-cranges.c:251:2: note: Taking false branch
if (WARN_ON_ONCE(cr && !cr->nr_ranges)) {
^
block/blk-cranges.c:259:6: note: 'cr' is non-null
if (cr && !blk_check_ranges(disk, cr)) {
^~
block/blk-cranges.c:259:6: note: Left side of '&&' is true
block/blk-cranges.c:259:12: note: Assuming the condition is true
if (cr && !blk_check_ranges(disk, cr)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~
block/blk-cranges.c:259:2: note: Taking true branch
if (cr && !blk_check_ranges(disk, cr)) {
^
block/blk-cranges.c:261:3: note: Null pointer value stored to 'cr'
cr = NULL;
^~~~~~~~~
block/blk-cranges.c:264:33: note: Passing null pointer value via 2nd
parameter 'new'
if (!blk_cranges_changed(disk, cr)) {
^~
block/blk-cranges.c:264:7: note: Calling 'blk_cranges_changed'
if (!blk_cranges_changed(disk, cr)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
block/blk-cranges.c:206:6: note: Assuming 'old' is non-null
if (!old || old->nr_ranges != new->nr_ranges)
^~~~
block/blk-cranges.c:206:6: note: Left side of '||' is false
block/blk-cranges.c:206:32: note: Access to field 'nr_ranges'
results in a dereference of a null pointer (loaded from variable 'new')
if (!old || old->nr_ranges != new->nr_ranges)
^~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers.
Use -system-headers to display errors from system headers as well.
3 warnings generated. Suppressed 3 warnings (3 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated. Suppressed 3 warnings (3 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated. Suppressed 2 warnings (2 in non-user code).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.drivers/char/tpm/eventlog/tpm1.c:276:2: warning: Value stored to 'len' is never read [clang-analyzer-deadcode.DeadStores]
len += get_event_name(eventname, event, event_entry);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/char/tpm/eventlog/tpm1.c:276:2: note: Value stored to 'len'
is never read
len += get_event_name(eventname, event, event_entry);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 7 warnings (5 in non-user code, 2 with check filters).
Use -header-filter=.* to display errors from all non-system headers.
Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. Suppressed 5 warnings (4 in non-user code, 1 with check filters).Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated. vim +206 block/blk-cranges.c5bede30cfe0b7d Damien Le Moal 2021-07-23 200 5bede30cfe0b7d Damien Le Moal 2021-07-23 201 static bool blk_cranges_changed(struct gendisk *disk, struct blk_cranges *new)
5bede30cfe0b7d Damien Le Moal 2021-07-23 202 {
5bede30cfe0b7d Damien Le Moal 2021-07-23 203 struct blk_cranges *old
= disk->queue->cranges;
5bede30cfe0b7d Damien Le Moal 2021-07-23 204 int i;5bede30cfe0b7d Damien Le Moal 2021-07-23 205 5bede30cfe0b7d Damien Le Moal 2021-07-23 @206 if (!old || old->nr_ranges != new->nr_ranges)
5bede30cfe0b7d Damien Le Moal 2021-07-23 207 return true;5bede30cfe0b7d Damien Le Moal 2021-07-23 208 5bede30cfe0b7d Damien Le Moal 2021-07-23 209 for (i = 0; i < new->nr_ranges; i++) { 5bede30cfe0b7d Damien Le Moal 2021-07-23 210 if (old->ranges[i].sector != new->ranges[i].sector || 5bede30cfe0b7d Damien Le Moal 2021-07-23 211 old->ranges[i].nr_sectors != new->ranges[i].nr_sectors)
5bede30cfe0b7d Damien Le Moal 2021-07-23 212 return true; 5bede30cfe0b7d Damien Le Moal 2021-07-23 213 }5bede30cfe0b7d Damien Le Moal 2021-07-23 214 5bede30cfe0b7d Damien Le Moal 2021-07-23 215 return false;
5bede30cfe0b7d Damien Le Moal 2021-07-23 216 } 5bede30cfe0b7d Damien Le Moal 2021-07-23 217 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
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