Hi Ganapatrao, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on arm-soc/for-next] [also build test WARNING on v5.4-rc6 next-20191107] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Ganapatrao-Prabhakerrao-Kulkarni/perf-core-Adding-capability-to-disable-PMUs-event-multiplexing/20191108-054345 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git for-next config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Debian 7.4.0-14) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): kernel/events/core.c: In function '__perf_mux_hrtimer_init': >> kernel/events/core.c:1097:10: warning: 'return' with a value, in function returning void return 0; ^ kernel/events/core.c:1085:13: note: declared here static void __perf_mux_hrtimer_init(struct perf_cpu_context *cpuctx, int cpu) ^~~~~~~~~~~~~~~~~~~~~~~ vim +/return +1097 kernel/events/core.c 1084 1085 static void __perf_mux_hrtimer_init(struct perf_cpu_context *cpuctx, int cpu) 1086 { 1087 struct hrtimer *timer = &cpuctx->hrtimer; 1088 struct pmu *pmu = cpuctx->ctx.pmu; 1089 u64 interval; 1090 1091 /* no multiplexing needed for SW PMU */ 1092 if (pmu->task_ctx_nr == perf_sw_context) 1093 return; 1094 1095 /* No PMU support */ 1096 if (pmu->capabilities & PERF_PMU_CAP_NO_MUX_EVENTS) > 1097 return 0; 1098 1099 /* 1100 * check default is sane, if not set then force to 1101 * default interval (1/tick) 1102 */ 1103 interval = pmu->hrtimer_interval_ms; 1104 if (interval < 1) 1105 interval = pmu->hrtimer_interval_ms = PERF_CPU_HRTIMER; 1106 1107 cpuctx->hrtimer_interval = ns_to_ktime(NSEC_PER_MSEC * interval); 1108 1109 raw_spin_lock_init(&cpuctx->hrtimer_lock); 1110 hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED_HARD); 1111 timer->function = perf_mux_hrtimer_handler; 1112 } 1113 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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