diff --git a/mm/cma_debug_bitmap_hex.c b/mm/cma_debug_bitmap_hex.c
index 3239be097896..bf9f7db28a14 100644
--- a/mm/cma_debug_bitmap_hex.c
+++ b/mm/cma_debug_bitmap_hex.c
@@ -96,7 +96,7 @@ static int cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
 	struct dentry *tmp;
 	char name[16];
 
-	scnprintf(name, sizeof(name), "cma-%s", cma->name);
+	scnprintf(name, sizeof(name), "%s", cma->name);
 
 	tmp = debugfs_lookup(name, root_dentry);
 	if (!tmp)