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: 34e047aa16c0123bbae8e2f6df33e5ecc1f56601 commit: e656972b69864348a747954ea187576808000c5a drivers/perf: Improve build test coverage date: 6 months ago :::::: branch date: 6 hours ago :::::: commit date: 6 months ago config: riscv-randconfig-c006-20220313 (https://download.01.org/0day-ci/archive/20220319/202203190951.jiez5n06-...@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 >>) ^ include/uapi/linux/byteorder/little_endian.h:40:26: note: expanded from macro '__be32_to_cpu' #define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x)) ^ include/uapi/linux/swab.h:118:2: note: expanded from macro '__swab32' (__builtin_constant_p((__u32)(x)) ? \ ^ fs/xfs/libxfs/xfs_dir2_node.c:824:2: note: Loop condition is true. Entering loop body for (lep = &leafhdr.ents[index]; ^ fs/xfs/libxfs/xfs_dir2_node.c:830:7: note: '?' condition is false if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) ^ include/linux/byteorder/generic.h:95:21: note: expanded from macro 'be32_to_cpu' #define be32_to_cpu __be32_to_cpu ^ include/uapi/linux/byteorder/little_endian.h:40:26: note: expanded from macro '__be32_to_cpu' #define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x)) ^ include/uapi/linux/swab.h:118:3: note: expanded from macro '__swab32' (__builtin_constant_p((__u32)(x)) ? \ ^ fs/xfs/libxfs/xfs_dir2_node.c:830:7: note: Assuming the condition is false if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) ^ include/linux/byteorder/generic.h:95:21: note: expanded from macro 'be32_to_cpu' #define be32_to_cpu __be32_to_cpu ^ include/uapi/linux/byteorder/little_endian.h:40:26: note: expanded from macro '__be32_to_cpu' #define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x)) ^ include/uapi/linux/swab.h:118:2: note: expanded from macro '__swab32' (__builtin_constant_p((__u32)(x)) ? \ ^ fs/xfs/libxfs/xfs_dir2_node.c:830:3: note: Taking false branch if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) ^ fs/xfs/libxfs/xfs_dir2_node.c:836:13: note: '?' condition is false be32_to_cpu(lep->address)); ^ include/linux/byteorder/generic.h:95:21: note: expanded from macro 'be32_to_cpu' #define be32_to_cpu __be32_to_cpu ^ include/uapi/linux/byteorder/little_endian.h:40:26: note: expanded from macro '__be32_to_cpu' #define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x)) ^ include/uapi/linux/swab.h:118:3: note: expanded from macro '__swab32' (__builtin_constant_p((__u32)(x)) ? \ ^ fs/xfs/libxfs/xfs_dir2_node.c:843:7: note: Assuming 'newdb' is equal to 'curdb' if (newdb != curdb) { ^~~~~~~~~~~~~~ fs/xfs/libxfs/xfs_dir2_node.c:843:3: note: Taking false branch if (newdb != curdb) { ^ fs/xfs/libxfs/xfs_dir2_node.c:873:43: note: Access to field 'b_addr' results in a dereference of a null pointer (loaded from variable 'curbp') dep = (xfs_dir2_data_entry_t *)((char *)curbp->b_addr + ^~~~~ fs/xfs/libxfs/xfs_dir2_node.c:1510:2: warning: Value stored to 'ents' is never read [clang-analyzer-deadcode.DeadStores] ents = leafhdr.ents; ^ ~~~~~~~~~~~~ fs/xfs/libxfs/xfs_dir2_node.c:1510:2: note: Value stored to 'ents' is never read ents = leafhdr.ents; ^ ~~~~~~~~~~~~ fs/xfs/libxfs/xfs_dir2_node.c:1572:3: warning: Value stored to 'ents' is never read [clang-analyzer-deadcode.DeadStores] ents = hdr2.ents; ^ ~~~~~~~~~ fs/xfs/libxfs/xfs_dir2_node.c:1572:3: note: Value stored to 'ents' is never read ents = hdr2.ents; ^ ~~~~~~~~~ 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. 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. 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. >> 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. include/linux/hid.h:1007:9: warning: Access to field 'name' results in a dereference of a null pointer (loaded from variable 'input') [clang-analyzer-core.NullDereference] input->name, c, type); ^ drivers/hid/hid-chicony.c:63:6: note: Assuming the condition is false if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/hid-chicony.c:63:2: note: Taking false branch if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR) ^ drivers/hid/hid-chicony.c:67:2: note: Control jumps to 'case 65291:' at line 78 switch (usage->hid & HID_USAGE) { ^ drivers/hid/hid-chicony.c:78:15: note: Calling 'hid_map_usage_clear' case 0xff0b: ch_map_key_clear(BTN_B); break; ^ drivers/hid/hid-chicony.c:57:29: note: expanded from macro 'ch_map_key_clear' #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/hid.h:1035:2: note: Calling 'hid_map_usage' hid_map_usage(hidinput, usage, bit, max, type, c); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/hid.h:982:2: note: 'input' initialized here struct input_dev *input = hidinput->input; ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/hid.h:986:2: note: Control jumps to 'case 1:' at line 995 switch (type) { ^ include/linux/hid.h:998:3: note: Execution continues on line 1005 break; ^ include/linux/hid.h:1005:15: note: 'c' is <= 'limit' if (unlikely(c > limit || !bmap)) { ^ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ include/linux/hid.h:1005:15: note: Left side of '||' is false if (unlikely(c > limit || !bmap)) { ^ include/linux/hid.h:1005:28: note: Assuming 'bmap' is null if (unlikely(c > limit || !bmap)) { ^ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ include/linux/hid.h:1005:28: note: Assuming pointer value is null if (unlikely(c > limit || !bmap)) { ^ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ include/linux/hid.h:1005:2: note: Taking true branch if (unlikely(c > limit || !bmap)) { ^ include/linux/hid.h:1006:3: note: Assuming the condition is true pr_warn_ratelimited("%s: Invalid code %d type %d\n", ^ include/linux/printk.h:656:2: note: expanded from macro 'pr_warn_ratelimited' printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:639:6: note: expanded from macro 'printk_ratelimited' if (__ratelimit(&_rs)) \ ^~~~~~~~~~~~~~~~~ include/linux/ratelimit_types.h:41:28: note: expanded from macro '__ratelimit' #define __ratelimit(state) ___ratelimit(state, __func__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/hid.h:1006:3: note: Taking true branch pr_warn_ratelimited("%s: Invalid code %d type %d\n", ^ include/linux/printk.h:656:2: note: expanded from macro 'pr_warn_ratelimited' printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^ include/linux/printk.h:639:2: note: expanded from macro 'printk_ratelimited' if (__ratelimit(&_rs)) \ ^ include/linux/hid.h:1006:3: note: Loop condition is false. Exiting loop 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
