perf stat: Introduce perf_evlist__reset_stats

To fit in with the rest of the helpers (alloc and free).

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1435310967-14570-9-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -216,15 +216,19 @@ static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
 	return -1;
 }
 
-static void perf_stat__reset_stats(struct perf_evlist *evlist)
+static void perf_evlist__reset_stats(struct perf_evlist *evlist)
 {
 	struct perf_evsel *evsel;
 
 	evlist__for_each(evlist, evsel) {
 		perf_evsel__reset_stat_priv(evsel);
 		perf_evsel__reset_counts(evsel);
 	}
+}
 
+static void perf_stat__reset_stats(void)
+{
+	perf_evlist__reset_stats(evsel_list);
 	perf_stat__reset_shadow_stats();
 }
 
@@ -1473,7 +1477,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 		status = run_perf_stat(argc, argv);
 		if (forever && status != -1) {
 			print_stat(argc, argv);
-			perf_stat__reset_stats(evsel_list);
+			perf_stat__reset_stats();
 		}
 	}