diff --git a/include/linux/key.h b/include/linux/key.h
index c59d1008c4fc6cc8d24d80d16745d231294a77f9..a06649f3223d29d76469b4830a4ed220bd36ee86 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -132,6 +132,12 @@ typedef int (*key_restrict_link_func_t)(struct key *dest_keyring,
 					const union key_payload *payload,
 					struct key *restriction_key);
 
+struct key_restriction {
+	key_restrict_link_func_t check;
+	struct key *key;
+	struct key_type *keytype;
+};
+
 /*****************************************************************************/
 /*
  * authentication token / access credential / keyring