left_dso          698 tools/perf/util/callchain.c 	struct dso *left_dso = left_map ? left_map->dso : NULL;
left_dso          701 tools/perf/util/callchain.c 	if (left_dso != right_dso)
left_dso          702 tools/perf/util/callchain.c 		return left_dso < right_dso ? MATCH_LT : MATCH_GT;