perf_record_header_feature
struct perf_record_header_feature feat;
if (ret == 0 && event->header.size == sizeof(struct perf_record_header_feature) &&
struct perf_record_header_feature *fe = &event->feat;
struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event;
[PERF_RECORD_HEADER_FEATURE] = sizeof(struct perf_record_header_feature),
struct perf_record_header_feature *fe;