Hi Robin, kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master] [also build test WARNING on v6.17-rc1 next-20250814] [cannot apply to perf-tools-next/perf-tools-next tip/perf/core perf-tools/perf-tools acme/perf/core] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Robin-Murphy/perf-arm-cmn-Fix-event-validation/20250814-010626 base: linus/master patch link: https://lore.kernel.org/r/ace3532a8a438a96338bf349a27636d8294c7111.1755096883.git.robin.murphy%40arm.com patch subject: [PATCH 19/19] perf: Garbage-collect event_init checks config: i386-randconfig-003-20250814 (https://download.01.org/0day-ci/archive/20250814/202508141524.qvgookmd-...@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250814/202508141524.qvgookmd-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508141524.qvgookmd-...@intel.com/ All warnings (new ones prefixed by >>): >> arch/x86/events/intel/uncore_snb.c:905:24: warning: unused variable 'hwc' >> [-Wunused-variable] 905 | struct hw_perf_event *hwc = &event->hw; | ^~~ 1 warning generated. vim +/hwc +905 arch/x86/events/intel/uncore_snb.c 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 896 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 897 /* 9aae1780e7e81e arch/x86/events/intel/uncore_snb.c Kan Liang 2018-05-03 898 * Keep the custom event_init() function compatible with old event 9aae1780e7e81e arch/x86/events/intel/uncore_snb.c Kan Liang 2018-05-03 899 * encoding for free running counters. 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 900 */ 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 901 static int snb_uncore_imc_event_init(struct perf_event *event) 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 902 { 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 903 struct intel_uncore_pmu *pmu; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 904 struct intel_uncore_box *box; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 @905 struct hw_perf_event *hwc = &event->hw; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 906 u64 cfg = event->attr.config & SNB_UNCORE_PCI_IMC_EVENT_MASK; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 907 int idx, base; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 908 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 909 pmu = uncore_event_to_pmu(event); 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 910 /* no device found for this pmu */ 3f710be02ea648 arch/x86/events/intel/uncore_snb.c Kan Liang 2025-01-08 911 if (!pmu->registered) 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 912 return -ENOENT; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 913 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 914 /* check only supported bits are set */ 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 915 if (event->attr.config & ~SNB_UNCORE_PCI_IMC_EVENT_MASK) 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 916 return -EINVAL; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 917 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 918 box = uncore_pmu_to_box(pmu, event->cpu); 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 919 if (!box || box->cpu < 0) 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 920 return -EINVAL; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 921 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 922 event->cpu = box->cpu; 1f2569fac6c6dd arch/x86/events/intel/uncore_snb.c Thomas Gleixner 2016-02-22 923 event->pmu_private = box; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 924 e64cd6f73ff5a7 arch/x86/events/intel/uncore_snb.c David Carrillo-Cisneros 2016-08-17 925 event->event_caps |= PERF_EV_CAP_READ_ACTIVE_PKG; e64cd6f73ff5a7 arch/x86/events/intel/uncore_snb.c David Carrillo-Cisneros 2016-08-17 926 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 927 event->hw.idx = -1; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 928 event->hw.last_tag = ~0ULL; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 929 event->hw.extra_reg.idx = EXTRA_REG_NONE; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 930 event->hw.branch_reg.idx = EXTRA_REG_NONE; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 931 /* 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 932 * check event is known (whitelist, determines counter) 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 933 */ 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 934 switch (cfg) { 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 935 case SNB_UNCORE_PCI_IMC_DATA_READS: 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 936 base = SNB_UNCORE_PCI_IMC_DATA_READS_BASE; 9aae1780e7e81e arch/x86/events/intel/uncore_snb.c Kan Liang 2018-05-03 937 idx = UNCORE_PMC_IDX_FREERUNNING; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 938 break; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 939 case SNB_UNCORE_PCI_IMC_DATA_WRITES: 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 940 base = SNB_UNCORE_PCI_IMC_DATA_WRITES_BASE; 9aae1780e7e81e arch/x86/events/intel/uncore_snb.c Kan Liang 2018-05-03 941 idx = UNCORE_PMC_IDX_FREERUNNING; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 942 break; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 943 case SNB_UNCORE_PCI_IMC_GT_REQUESTS: 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 944 base = SNB_UNCORE_PCI_IMC_GT_REQUESTS_BASE; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 945 idx = UNCORE_PMC_IDX_FREERUNNING; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 946 break; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 947 case SNB_UNCORE_PCI_IMC_IA_REQUESTS: 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 948 base = SNB_UNCORE_PCI_IMC_IA_REQUESTS_BASE; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 949 idx = UNCORE_PMC_IDX_FREERUNNING; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 950 break; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 951 case SNB_UNCORE_PCI_IMC_IO_REQUESTS: 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 952 base = SNB_UNCORE_PCI_IMC_IO_REQUESTS_BASE; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 953 idx = UNCORE_PMC_IDX_FREERUNNING; 24633d901ea44f arch/x86/events/intel/uncore_snb.c Vaibhav Shankar 2020-08-13 954 break; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 955 default: 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 956 return -EINVAL; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 957 } 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 958 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 959 /* must be done before validate_group */ 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 960 event->hw.event_base = base; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 961 event->hw.idx = idx; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 962 8041ffd36f42d8 arch/x86/events/intel/uncore_snb.c Kan Liang 2019-02-27 963 /* Convert to standard encoding format for freerunning counters */ 8041ffd36f42d8 arch/x86/events/intel/uncore_snb.c Kan Liang 2019-02-27 964 event->hw.config = ((cfg - 1) << 8) | 0x10ff; 8041ffd36f42d8 arch/x86/events/intel/uncore_snb.c Kan Liang 2019-02-27 965 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 966 /* no group validation needed, we have free running counters */ 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 967 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 968 return 0; 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 969 } 92807ffdf32c38 arch/x86/kernel/cpu/perf_event_intel_uncore_snb.c Yan, Zheng 2014-07-30 970 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
