tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/hybrid head: d8d36d49b08781039deaf70e63f661cf55d28d2a commit: a90ca7c4fc7dbada15912371642b1bb9e24b2b25 [17/26] perf/x86: Register hybrid PMUs config: i386-randconfig-s001-20210414 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-280-g2cd6d34e-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue perf/hybrid git checkout a90ca7c4fc7dbada15912371642b1bb9e24b2b25 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/x86/events/core.c: In function 'init_hw_perf_events': 2121 | u8 cpu_type = get_this_hybrid_cpu_type(); | ^~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/get_this_hybrid_cpu_type +2121 arch/x86/events/core.c 2021 2022 static int __init init_hw_perf_events(void) 2023 { 2024 struct x86_pmu_quirk *quirk; 2025 int err; 2026 2027 pr_info("Performance Events: "); 2028 2029 switch (boot_cpu_data.x86_vendor) { 2030 case X86_VENDOR_INTEL: 2031 err = intel_pmu_init(); 2032 break; 2033 case X86_VENDOR_AMD: 2034 err = amd_pmu_init(); 2035 break; 2036 case X86_VENDOR_HYGON: 2037 err = amd_pmu_init(); 2038 x86_pmu.name = "HYGON"; 2039 break; 2040 case X86_VENDOR_ZHAOXIN: 2041 case X86_VENDOR_CENTAUR: 2042 err = zhaoxin_pmu_init(); 2043 break; 2044 default: 2045 err = -ENOTSUPP; 2046 } 2047 if (err != 0) { 2048 pr_cont("no PMU driver, software events only.\n"); 2049 return 0; 2050 } 2051 2052 pmu_check_apic(); 2053 2054 /* sanity check that the hardware exists or is emulated */ 2055 if (!check_hw_exists(&pmu, x86_pmu.num_counters, x86_pmu.num_counters_fixed)) 2056 return 0; 2057 2058 pr_cont("%s PMU driver.\n", x86_pmu.name); 2059 2060 x86_pmu.attr_rdpmc = 1; /* enable userspace RDPMC usage by default */ 2061 2062 for (quirk = x86_pmu.quirks; quirk; quirk = quirk->next) 2063 quirk->func(); 2064 2065 if (!x86_pmu.intel_ctrl) 2066 x86_pmu.intel_ctrl = (1 << x86_pmu.num_counters) - 1; 2067 2068 perf_events_lapic_init(); 2069 register_nmi_handler(NMI_LOCAL, perf_event_nmi_handler, 0, "PMI"); 2070 2071 unconstrained = (struct event_constraint) 2072 __EVENT_CONSTRAINT(0, (1ULL << x86_pmu.num_counters) - 1, 2073 0, x86_pmu.num_counters, 0, 0); 2074 2075 x86_pmu_format_group.attrs = x86_pmu.format_attrs; 2076 2077 if (!x86_pmu.events_sysfs_show) 2078 x86_pmu_events_group.attrs = &empty_attrs; 2079 2080 pmu.attr_update = x86_pmu.attr_update; 2081 2082 if (!is_hybrid()) { 2083 x86_pmu_show_pmu_cap(x86_pmu.num_counters, 2084 x86_pmu.num_counters_fixed, 2085 x86_pmu.intel_ctrl); 2086 } 2087 2088 if (!x86_pmu.read) 2089 x86_pmu.read = _x86_pmu_read; 2090 2091 if (!x86_pmu.guest_get_msrs) 2092 x86_pmu.guest_get_msrs = (void *)&__static_call_return0; 2093 2094 x86_pmu_static_call_update(); 2095 2096 /* 2097 * Install callbacks. Core will call them for each online 2098 * cpu. 2099 */ 2100 err = cpuhp_setup_state(CPUHP_PERF_X86_PREPARE, "perf/x86:prepare", 2101 x86_pmu_prepare_cpu, x86_pmu_dead_cpu); 2102 if (err) 2103 return err; 2104 2105 err = cpuhp_setup_state(CPUHP_AP_PERF_X86_STARTING, 2106 "perf/x86:starting", x86_pmu_starting_cpu, 2107 x86_pmu_dying_cpu); 2108 if (err) 2109 goto out; 2110 2111 err = cpuhp_setup_state(CPUHP_AP_PERF_X86_ONLINE, "perf/x86:online", 2112 x86_pmu_online_cpu, NULL); 2113 if (err) 2114 goto out1; 2115 2116 if (!is_hybrid()) { 2117 err = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW); 2118 if (err) 2119 goto out2; 2120 } else { 2122 struct x86_hybrid_pmu *hybrid_pmu; 2123 int i, j; 2124 2125 if (!cpu_type && x86_pmu.get_hybrid_cpu_type) 2126 cpu_type = x86_pmu.get_hybrid_cpu_type(); 2127 2128 for (i = 0; i < x86_pmu.num_hybrid_pmus; i++) { 2129 hybrid_pmu = &x86_pmu.hybrid_pmu[i]; 2130 2131 hybrid_pmu->pmu = pmu; 2132 hybrid_pmu->pmu.type = -1; 2133 hybrid_pmu->pmu.attr_update = x86_pmu.attr_update; 2134 hybrid_pmu->pmu.capabilities |= PERF_PMU_CAP_HETEROGENEOUS_CPUS; 2135 2136 err = perf_pmu_register(&hybrid_pmu->pmu, hybrid_pmu->name, 2137 (hybrid_pmu->cpu_type == hybrid_big) ? PERF_TYPE_RAW : -1); 2138 if (err) 2139 break; 2140 2141 if (cpu_type == hybrid_pmu->cpu_type) 2142 x86_pmu_update_cpu_context(&hybrid_pmu->pmu, raw_smp_processor_id()); 2143 } 2144 2145 if (i < x86_pmu.num_hybrid_pmus) { 2146 for (j = 0; j < i; j++) 2147 perf_pmu_unregister(&x86_pmu.hybrid_pmu[j].pmu); 2148 pr_warn("Failed to register hybrid PMUs\n"); 2149 kfree(x86_pmu.hybrid_pmu); 2150 x86_pmu.hybrid_pmu = NULL; 2151 x86_pmu.num_hybrid_pmus = 0; 2152 goto out2; 2153 } 2154 } 2155 2156 return 0; 2157 2158 out2: 2159 cpuhp_remove_state(CPUHP_AP_PERF_X86_ONLINE); 2160 out1: 2161 cpuhp_remove_state(CPUHP_AP_PERF_X86_STARTING); 2162 out: 2163 cpuhp_remove_state(CPUHP_PERF_X86_PREPARE); 2164 return err; 2165 } 2166 early_initcall(init_hw_perf_events); 2167 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org