perf top: Use evlist__new_default when no events specified

Rather than distributing the code doing similar things to
evlist__new_default, use the one implementation so that paranoia and
wildcard scanning can be optimized.

Signed-off-by: Ian Rogers <[e-mail]>
Tested-by: James Clark <[e-mail]>
Signed-off-by: Namhyung Kim <[e-mail]>

tools/perf/builtin-top.c

···
 		goto out_delete_evlist;
 
 	if (!top.evlist->core.nr_entries) {
-		bool can_profile_kernel = perf_event_paranoid_check(1);
-		int err = parse_event(top.evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");
+		struct evlist *def_evlist = evlist__new_default();
 
-		if (err)
+		if (!def_evlist)
 			goto out_delete_evlist;
+
+		evlist__splice_list_tail(top.evlist, &def_evlist->core.entries);
+		evlist__delete(def_evlist);
 	}
 
 	status = evswitch__init(&top.evswitch, top.evlist, stderr);