--- zzzz-none-000/linux-4.9.231/include/uapi/linux/atmdev.h	2020-07-22 07:10:54.000000000 +0000
+++ falcon-5590-729/linux-4.9.231/include/uapi/linux/atmdev.h	2022-03-30 12:03:35.000000000 +0000
@@ -106,6 +106,8 @@
 #endif
 #define ATM_DROPPARTY 	_IOW('a', ATMIOC_SPECIAL+5,int)
 					/* drop party from p2mp call */
+#define ATM_DELBACKENDIF _IOW('a', ATMIOC_SPECIAL + 6, atm_backend_t)
+/* set backend to remove if */
 
 /*
  * These are backend handkers that can be set via the ATM_SETBACKEND call