diff --git a/mm/nommu.c b/mm/nommu.c
index 9876fa0..8687973 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1143,9 +1143,6 @@
 		if (ret < rlen)
 			memset(base + ret, 0, rlen - ret);
 
-	} else {
-		/* if it's an anonymous mapping, then just clear it */
-		memset(base, 0, rlen);
 	}
 
 	return 0;
@@ -1343,6 +1340,11 @@
 		goto error_just_free;
 	add_nommu_region(region);
 
+	/* clear anonymous mappings that don't ask for uninitialized data */
+	if (!vma->vm_file && !(flags & MAP_UNINITIALIZED))
+		memset((void *)region->vm_start, 0,
+		       region->vm_end - region->vm_start);
+
 	/* okay... we have a mapping; now we have to register it */
 	result = vma->vm_start;