diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 180906c36f51..332d08d2fe0d 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -532,9 +532,11 @@ static int kernfs_fop_mmap(struct file *file, struct vm_area_struct *vma)
 		goto out_put;
 
 	rc = 0;
-	of->mmapped = true;
-	of_on(of)->nr_mmapped++;
-	of->vm_ops = vma->vm_ops;
+	if (!of->mmapped) {
+		of->mmapped = true;
+		of_on(of)->nr_mmapped++;
+		of->vm_ops = vma->vm_ops;
+	}
 	vma->vm_ops = &kernfs_vm_ops;
 out_put:
 	kernfs_put_active(of->kn);