}
if (top->evlist->nr_entries == 1) {
- struct perf_evsel *first;
- first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+ struct perf_evsel *first = perf_evlist__first(top->evlist);
ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
(uint64_t)first->attr.sample_period,
top->freq ? "Hz" : "");