Re: [RFC 1/4] drivers/nvdimm: Add perf interface to expose nvdimm performance stats

+static void nvdimm_pmu_read(struct perf_event *event) +{ + struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); + + /* jump to arch/platform specific callbacks if any */ + if (nd_pmu && nd_pmu->read) + nd_pmu->read(event, nd_pmu->dev); +} + +static void nvdimm_pmu_del(struct perf_event *event, int flags) +{ + struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); + + /* jump to arch/platform specific callbacks if any */ + if (nd_pmu && nd_pmu->del) + nd_pmu->del(event, flags, nd_pmu->dev); +} + +static int nvdimm_pmu_add(struct perf_event *event, int flags) +{ + struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); + + if (flags & PERF_EF_START) + /* jump to arch/platform specific callbacks if any */ + if (nd_pmu && nd_pmu->add) + return nd_pmu->add(event, flags, nd_pmu->dev); + return 0; +}