perf hists: Rename hists__fprintf_nr_events to events_stats__fprintf

As this function deals exclusively with hists->stats.

Preparatory patch for removing the by now needless session->hists, that
should be just session->stats.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-be0o8si9f1z40cwoa534f7me@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/stdio/hist.c

@@ -459,23 +459,23 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 	return ret;
 }
 
-size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
+size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
 {
 	int i;
 	size_t ret = 0;
 
 	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
 		const char *name;
 
-		if (hists->stats.nr_events[i] == 0)
+		if (stats->nr_events[i] == 0)
 			continue;
 
 		name = perf_event__name(i);
 		if (!strcmp(name, "UNKNOWN"))
 			continue;
 
 		ret += fprintf(fp, "%16s events: %10d\n", name,
-			       hists->stats.nr_events[i]);
+			       stats->nr_events[i]);
 	}
 
 	return ret;

tools/perf/util/hist.h

@@ -98,7 +98,7 @@ void hists__output_recalc_col_len(struct hists *hists, int max_rows);
 
 void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h);
 void hists__inc_nr_events(struct hists *self, u32 type);
-size_t hists__fprintf_nr_events(struct hists *self, FILE *fp);
+size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);
 
 size_t hists__fprintf(struct hists *self, bool show_header, int max_rows,
 		      int max_cols, FILE *fp);

tools/perf/util/session.c

@@ -1353,11 +1353,11 @@ size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
 	struct perf_evsel *pos;
 	size_t ret = fprintf(fp, "Aggregated stats:\n");
 
-	ret += hists__fprintf_nr_events(&session->hists, fp);
+	ret += events_stats__fprintf(&session->hists.stats, fp);
 
 	list_for_each_entry(pos, &session->evlist->entries, node) {
 		ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
-		ret += hists__fprintf_nr_events(&pos->hists, fp);
+		ret += events_stats__fprintf(&pos->hists.stats, fp);
 	}
 
 	return ret;