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-rw-r--r--tools/perf/util/sort.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 30254eb637099..92a1bd695e8aa 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -3372,7 +3372,7 @@ int sort_dimension__add(struct perf_hpp_list *list, const char *tok,
sort_dimension_add_dynamic_header(sd);
}
- if (sd->entry == &sort_parent) {
+ if (sd->entry == &sort_parent && parent_pattern) {
int ret = regcomp(&parent_regex, parent_pattern, REG_EXTENDED);
if (ret) {
char err[BUFSIZ];