diff --git a/tools/perf/tests/bitmap.c b/tools/perf/tests/bitmap.c
index 47bedf25ba69..96e7fc1ad3f9 100644
--- a/tools/perf/tests/bitmap.c
+++ b/tools/perf/tests/bitmap.c
@@ -16,8 +16,6 @@ static unsigned long *get_bitmap(const char *str, int nbits)
 	bm = bitmap_alloc(nbits);
 
 	if (map && bm) {
-		bitmap_zero(bm, nbits);
-
 		for (i = 0; i < map->nr; i++)
 			set_bit(map->map[i], bm);
 	}
diff --git a/tools/perf/tests/mem2node.c b/tools/perf/tests/mem2node.c
index 0c3c87f86e03..9e9e4d37cc77 100644
--- a/tools/perf/tests/mem2node.c
+++ b/tools/perf/tests/mem2node.c
@@ -24,8 +24,6 @@ static unsigned long *get_bitmap(const char *str, int nbits)
 	bm = bitmap_alloc(nbits);
 
 	if (map && bm) {
-		bitmap_zero(bm, nbits);
-
 		for (i = 0; i < map->nr; i++) {
 			set_bit(map->map[i], bm);
 		}
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 5af58aac91ad..5f1af7b07b96 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -279,8 +279,6 @@ static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
 	if (!set)
 		return -ENOMEM;
 
-	bitmap_zero(set, size);
-
 	p = (u64 *) set;
 
 	for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
@@ -1285,7 +1283,6 @@ static int memory_node__read(struct memory_node *n, unsigned long idx)
 		return -ENOMEM;
 	}
 
-	bitmap_zero(n->set, size);
 	n->node = idx;
 	n->size = size;