--- zzzz-none-000/linux-4.4.271/net/atm/common.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/net/atm/common.c	2023-04-19 10:22:30.000000000 +0000
@@ -141,6 +141,28 @@
 	.release_cb = vcc_release_cb,
 };
 
+#ifdef CONFIG_LTQ_OAM
+int (*push_oam_pfn)(struct atm_vcc *atmvcc, void *cell) = NULL;
+EXPORT_SYMBOL(push_oam_pfn);
+
+int ifx_push_oam(struct atm_vcc *atmvcc, void *cell)
+{
+       if (push_oam_pfn != NULL)
+               return push_oam_pfn(atmvcc, cell);
+       return -1;
+}
+EXPORT_SYMBOL(ifx_push_oam);
+#endif
+
+#if defined(CONFIG_VRX318_DATAPATH) || defined(CONFIG_VRX318_DATAPATH_MODULE) || \
+	defined(CONFIG_VRX518_TC) || defined(CONFIG_VRX518_TC_MODULE) || IS_ENABLED(CONFIG_VRX518)
+void (*atm_hook_mpoa_setup)(struct atm_vcc *, int, int, struct net_device *) = NULL;
+EXPORT_SYMBOL(atm_hook_mpoa_setup);
+#else
+void (*ppa_hook_mpoa_setup)(struct atm_vcc *, int, int) = NULL;
+EXPORT_SYMBOL(ppa_hook_mpoa_setup);
+#endif
+
 int vcc_create(struct net *net, struct socket *sock, int protocol, int family, int kern)
 {
 	struct sock *sk;
@@ -165,8 +187,11 @@
 	atomic_set(&sk->sk_rmem_alloc, 0);
 	vcc->push = NULL;
 	vcc->pop = NULL;
-	vcc->owner = NULL;
+#ifdef CONFIG_LTQ_OAM
+	vcc->push_oam = ifx_push_oam;
+#else
 	vcc->push_oam = NULL;
+#endif
 	vcc->release_cb = NULL;
 	vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
 	vcc->atm_options = vcc->aal_options = 0;