From ba409253355761328dc575e069297b917d434467 Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Mon, 7 Mar 2016 21:23:22 +0100
Subject: [PATCH] tcpip_send_api_msg function is only needed in
 non-core-locking mode

---
 src/api/tcpip.c                    | 5 +++++
 src/include/lwip/priv/tcpip_priv.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/src/api/tcpip.c b/src/api/tcpip.c
index 3d92ca46..8f994fdc 100644
--- a/src/api/tcpip.c
+++ b/src/api/tcpip.c
@@ -46,6 +46,7 @@
 #include "lwip/mem.h"
 #include "lwip/init.h"
 #include "lwip/ip.h"
+#include "lwip/pbuf.h"
 #include "netif/etharp.h"
 
 #define TCPIP_MSG_VAR_REF(name)     API_VAR_REF(name)
@@ -97,10 +98,12 @@ tcpip_thread(void *arg)
       continue;
     }
     switch (msg->type) {
+#if !LWIP_TCPIP_CORE_LOCKING
     case TCPIP_MSG_API:
       LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
       msg->msg.api.function(msg->msg.api.msg);
       break;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
 
 #if !LWIP_TCPIP_CORE_LOCKING_INPUT
     case TCPIP_MSG_INPKT:
@@ -300,6 +303,7 @@ tcpip_untimeout(sys_timeout_handler h, void *arg)
 #endif /* LWIP_TCPIP_TIMEOUT */
 
 
+#if !LWIP_TCPIP_CORE_LOCKING
 /**
  * Generic way to dispatch an API message in TCPIP thread.
  *
@@ -325,6 +329,7 @@ tcpip_send_api_msg(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem)
   }
   return ERR_VAL;
 }
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
 
 /**
  * Allocate a structure for a static callback message and initialize it.
diff --git a/src/include/lwip/priv/tcpip_priv.h b/src/include/lwip/priv/tcpip_priv.h
index e4c8fe60..5d19ee3c 100644
--- a/src/include/lwip/priv/tcpip_priv.h
+++ b/src/include/lwip/priv/tcpip_priv.h
@@ -95,7 +95,9 @@ extern sys_mutex_t lock_tcpip_core;
 #define API_EXPR_DEREF(expr)            *(expr)
 #endif /* LWIP_MPU_COMPATIBLE */
 
+#if !LWIP_TCPIP_CORE_LOCKING
 err_t tcpip_send_api_msg(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem);
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
 
 enum tcpip_msg_type {
   TCPIP_MSG_API,