CC: l...@lists.linux.dev CC: kbuild-...@lists.01.org BCC: l...@intel.com CC: linux-ker...@vger.kernel.org TO: John Garry <john.ga...@huawei.com> CC: Will Deacon <w...@kernel.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 56e337f2cf1326323844927a04e9dbce9a244835 commit: e656972b69864348a747954ea187576808000c5a drivers/perf: Improve build test coverage date: 5 months ago :::::: branch date: 21 hours ago :::::: commit date: 5 months ago config: riscv-randconfig-c006-20220313 (https://download.01.org/0day-ci/archive/20220316/202203162129.qyctdjxt-...@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 43f668b98e8d87290fc6bbf5ed13c3ab542e3497) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e656972b69864348a747954ea187576808000c5a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e656972b69864348a747954ea187576808000c5a # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> clang-analyzer warnings: (new ones prefixed by >>) fs/xfs/xfs_sysfs.c:633:25: note: Passing value via 1st parameter 'kobj' error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype, ^~~~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.c:633:10: note: Calling 'xfs_sysfs_init' error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.h:37:11: note: Assuming 'parent_kobj' is null parent = parent_kobj ? &parent_kobj->kobject : NULL; ^~~~~~~~~~~ fs/xfs/xfs_sysfs.h:37:11: note: '?' condition is false fs/xfs/xfs_sysfs.h:38:18: note: Passing value via 1st parameter 'x' init_completion(&kobj->complete); ^~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.h:38:2: note: Calling 'init_completion' init_completion(&kobj->complete); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/completion.h:86:10: note: Access to field 'done' results in a dereference of a null pointer (loaded from variable 'x') x->done = 0; ~ ^ Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 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. crypto/pcbc.c:74:10: warning: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' [clang-analyzer-deadcode.DeadStores] while ((nbytes = walk.nbytes)) { ^ ~~~~~~~~~~~ crypto/pcbc.c:74:10: note: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' while ((nbytes = walk.nbytes)) { ^ ~~~~~~~~~~~ crypto/pcbc.c:141:10: warning: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' [clang-analyzer-deadcode.DeadStores] while ((nbytes = walk.nbytes)) { ^ ~~~~~~~~~~~ crypto/pcbc.c:141:10: note: Although the value stored to 'nbytes' is used in the enclosing expression, the value is never actually read from 'nbytes' while ((nbytes = walk.nbytes)) { ^ ~~~~~~~~~~~ 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. fs/xfs/xfs_pnfs.c:39:3: warning: Value stored to 'error' is never read [clang-analyzer-deadcode.DeadStores] error = break_layout(inode, true); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ fs/xfs/xfs_pnfs.c:39:3: note: Value stored to 'error' is never read error = break_layout(inode, true); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. >> drivers/perf/arm_smmuv3_pmu.c:349:17: warning: Value stored to 'dev' during >> its initialization is never read [clang-analyzer-deadcode.DeadStores] struct device *dev = smmu_pmu->dev; ^~~ ~~~~~~~~~~~~~ drivers/perf/arm_smmuv3_pmu.c:349:17: note: Value stored to 'dev' during its initialization is never read struct device *dev = smmu_pmu->dev; ^~~ ~~~~~~~~~~~~~ Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. drivers/hwtracing/intel_th/msu.c:860:2: warning: Value stored to 'reg' is never read [clang-analyzer-deadcode.DeadStores] reg = ioread32(msc->reg_base + REG_MSU_MSC0STS); ^ drivers/hwtracing/intel_th/msu.c:860:2: note: Value stored to 'reg' is never read Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. drivers/fpga/altera-pr-ip-core.c:188:2: warning: Value stored to 'val' is never read [clang-analyzer-deadcode.DeadStores] val = readl(priv->reg_base + ALT_PR_CSR_OFST); ^ drivers/fpga/altera-pr-ip-core.c:188:2: note: Value stored to 'val' is never read Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. drivers/staging/rts5208/ms.c:1770:3: warning: Value stored to 'retval' is never read [clang-analyzer-deadcode.DeadStores] retval = ms_set_rw_reg_addr(chip, OVERWRITE_FLAG, MS_EXTRA_SIZE, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/rts5208/ms.c:1770:3: note: Value stored to 'retval' is never read retval = ms_set_rw_reg_addr(chip, OVERWRITE_FLAG, MS_EXTRA_SIZE, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 9 warnings (2 in non-user code, 7 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. 9 warnings generated. Suppressed 9 warnings (2 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 11 warnings generated. drivers/staging/iio/adc/ad7280a.c:130:8: warning: Excessive padding in 'struct ad7280_state' (110 padding bytes, where 46 is optimal). Optimal fields order: buf, spi, channels, iio_attr, lock, slave_num, scan_cnt, readback_delay_us, ctrl_hb, ctrl_lb, cell_threshhigh, cell_threshlow, aux_threshhigh, aux_threshlow, cb_mask, crc_tab, consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding] struct ad7280_state { ~~~~~~~^~~~~~~~~~~~~~ drivers/staging/iio/adc/ad7280a.c:130:8: note: Excessive padding in 'struct ad7280_state' (110 padding bytes, where 46 is optimal). Optimal fields order: buf, spi, channels, iio_attr, lock, slave_num, scan_cnt, readback_delay_us, ctrl_hb, ctrl_lb, cell_threshhigh, cell_threshlow, aux_threshhigh, aux_threshlow, cb_mask, crc_tab, consider reordering the fields or adding explicit padding members struct ad7280_state { ~~~~~~~^~~~~~~~~~~~~~ Suppressed 10 warnings (3 in non-user code, 7 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. 11 warnings generated. drivers/staging/iio/addac/adt7316.c:1888:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK1, mask); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/staging/iio/addac/adt7316.c:1888:2: note: Value stored to 'ret' is never read ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK1, mask); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 10 warnings (3 in non-user code, 7 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. 10 warnings generated. Suppressed 10 warnings (3 in non-user code, 7 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. 12 warnings generated. vim +/dev +349 drivers/perf/arm_smmuv3_pmu.c 3c9347351a6ea12 Robin Murphy 2019-08-01 339 7d839b4b9e00645 Neil Leeder 2019-03-26 340 /* 7d839b4b9e00645 Neil Leeder 2019-03-26 341 * Implementation of abstract pmu functionality required by 7d839b4b9e00645 Neil Leeder 2019-03-26 342 * the core perf events code. 7d839b4b9e00645 Neil Leeder 2019-03-26 343 */ 7d839b4b9e00645 Neil Leeder 2019-03-26 344 7d839b4b9e00645 Neil Leeder 2019-03-26 345 static int smmu_pmu_event_init(struct perf_event *event) 7d839b4b9e00645 Neil Leeder 2019-03-26 346 { 7d839b4b9e00645 Neil Leeder 2019-03-26 347 struct hw_perf_event *hwc = &event->hw; 7d839b4b9e00645 Neil Leeder 2019-03-26 348 struct smmu_pmu *smmu_pmu = to_smmu_pmu(event->pmu); 7d839b4b9e00645 Neil Leeder 2019-03-26 @349 struct device *dev = smmu_pmu->dev; 7d839b4b9e00645 Neil Leeder 2019-03-26 350 struct perf_event *sibling; 33e84ea4330da8a Robin Murphy 2019-08-01 351 int group_num_events = 1; 7d839b4b9e00645 Neil Leeder 2019-03-26 352 u16 event_id; 7d839b4b9e00645 Neil Leeder 2019-03-26 353 7d839b4b9e00645 Neil Leeder 2019-03-26 354 if (event->attr.type != event->pmu->type) 7d839b4b9e00645 Neil Leeder 2019-03-26 355 return -ENOENT; 7d839b4b9e00645 Neil Leeder 2019-03-26 356 7d839b4b9e00645 Neil Leeder 2019-03-26 357 if (hwc->sample_period) { 7d839b4b9e00645 Neil Leeder 2019-03-26 358 dev_dbg(dev, "Sampling not supported\n"); 7d839b4b9e00645 Neil Leeder 2019-03-26 359 return -EOPNOTSUPP; 7d839b4b9e00645 Neil Leeder 2019-03-26 360 } 7d839b4b9e00645 Neil Leeder 2019-03-26 361 7d839b4b9e00645 Neil Leeder 2019-03-26 362 if (event->cpu < 0) { 7d839b4b9e00645 Neil Leeder 2019-03-26 363 dev_dbg(dev, "Per-task mode not supported\n"); 7d839b4b9e00645 Neil Leeder 2019-03-26 364 return -EOPNOTSUPP; 7d839b4b9e00645 Neil Leeder 2019-03-26 365 } 7d839b4b9e00645 Neil Leeder 2019-03-26 366 7d839b4b9e00645 Neil Leeder 2019-03-26 367 /* Verify specified event is supported on this PMU */ 7d839b4b9e00645 Neil Leeder 2019-03-26 368 event_id = get_event(event); 7d839b4b9e00645 Neil Leeder 2019-03-26 369 if (event_id < SMMU_PMCG_ARCH_MAX_EVENTS && 7d839b4b9e00645 Neil Leeder 2019-03-26 370 (!test_bit(event_id, smmu_pmu->supported_events))) { 7d839b4b9e00645 Neil Leeder 2019-03-26 371 dev_dbg(dev, "Invalid event %d for this PMU\n", event_id); 7d839b4b9e00645 Neil Leeder 2019-03-26 372 return -EINVAL; 7d839b4b9e00645 Neil Leeder 2019-03-26 373 } 7d839b4b9e00645 Neil Leeder 2019-03-26 374 7d839b4b9e00645 Neil Leeder 2019-03-26 375 /* Don't allow groups with mixed PMUs, except for s/w events */ 33e84ea4330da8a Robin Murphy 2019-08-01 376 if (!is_software_event(event->group_leader)) { 3c9347351a6ea12 Robin Murphy 2019-08-01 377 if (!smmu_pmu_events_compatible(event->group_leader, event)) 33e84ea4330da8a Robin Murphy 2019-08-01 378 return -EINVAL; 33e84ea4330da8a Robin Murphy 2019-08-01 379 33e84ea4330da8a Robin Murphy 2019-08-01 380 if (++group_num_events > smmu_pmu->num_counters) 7d839b4b9e00645 Neil Leeder 2019-03-26 381 return -EINVAL; 7d839b4b9e00645 Neil Leeder 2019-03-26 382 } 7d839b4b9e00645 Neil Leeder 2019-03-26 383 7d839b4b9e00645 Neil Leeder 2019-03-26 384 for_each_sibling_event(sibling, event->group_leader) { 33e84ea4330da8a Robin Murphy 2019-08-01 385 if (is_software_event(sibling)) 33e84ea4330da8a Robin Murphy 2019-08-01 386 continue; 33e84ea4330da8a Robin Murphy 2019-08-01 387 3c9347351a6ea12 Robin Murphy 2019-08-01 388 if (!smmu_pmu_events_compatible(sibling, event)) 33e84ea4330da8a Robin Murphy 2019-08-01 389 return -EINVAL; 33e84ea4330da8a Robin Murphy 2019-08-01 390 33e84ea4330da8a Robin Murphy 2019-08-01 391 if (++group_num_events > smmu_pmu->num_counters) 7d839b4b9e00645 Neil Leeder 2019-03-26 392 return -EINVAL; 7d839b4b9e00645 Neil Leeder 2019-03-26 393 } 7d839b4b9e00645 Neil Leeder 2019-03-26 394 7d839b4b9e00645 Neil Leeder 2019-03-26 395 hwc->idx = -1; 7d839b4b9e00645 Neil Leeder 2019-03-26 396 7d839b4b9e00645 Neil Leeder 2019-03-26 397 /* 7d839b4b9e00645 Neil Leeder 2019-03-26 398 * Ensure all events are on the same cpu so all events are in the 7d839b4b9e00645 Neil Leeder 2019-03-26 399 * same cpu context, to avoid races on pmu_enable etc. 7d839b4b9e00645 Neil Leeder 2019-03-26 400 */ 7d839b4b9e00645 Neil Leeder 2019-03-26 401 event->cpu = smmu_pmu->on_cpu; 7d839b4b9e00645 Neil Leeder 2019-03-26 402 7d839b4b9e00645 Neil Leeder 2019-03-26 403 return 0; 7d839b4b9e00645 Neil Leeder 2019-03-26 404 } 7d839b4b9e00645 Neil Leeder 2019-03-26 405 :::::: The code at line 349 was first introduced by commit :::::: 7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 perf/smmuv3: Add arm64 smmuv3 pmu driver :::::: TO: Neil Leeder <nlee...@codeaurora.org> :::::: CC: Will Deacon <will.dea...@arm.com> --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org _______________________________________________ kbuild mailing list -- kbuild@lists.01.org To unsubscribe send an email to kbuild-le...@lists.01.org
