From 3d49a6b8463f25408864b494281cd49a8d204ffc Mon Sep 17 00:00:00 2001
From: XiongYu <xiongyu@espressif.com>
Date: Wed, 14 Nov 2018 01:58:28 +0000
Subject: [PATCH] bugfix(third_party): undefined reference to ETS_NMI_UNLOCK

fixes: https://github.com/espressif/ESP8266_RTOS_SDK/issues/160
---
 include/espressif/esp8266/ets_sys.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/espressif/esp8266/ets_sys.h b/include/espressif/esp8266/ets_sys.h
index 28736eb6..e3a6ce2f 100644
--- a/include/espressif/esp8266/ets_sys.h
+++ b/include/espressif/esp8266/ets_sys.h
@@ -40,6 +40,21 @@ extern uint32 WDEV_INTEREST_EVENT;
 #define INT_ENA_WDEV        0x3ff20c18
 #define WDEV_TSF0_REACH_INT (BIT(27))
 
+#define ETS_NMI_LOCK()  \
+    do {    \
+        char m = 10;    \
+        do {    \
+            REG_WRITE(INT_ENA_WDEV, 0); \
+            m = 10; \
+            for (; m > 0; m--) {}   \
+            REG_WRITE(INT_ENA_WDEV, WDEV_TSF0_REACH_INT);   \
+        } while(0); \
+    } while (0)
+ #define ETS_NMI_UNLOCK()    \
+    do {    \
+        REG_WRITE(INT_ENA_WDEV, WDEV_INTEREST_EVENT);   \
+    } while (0)
+    
 #define ETS_INTR_LOCK() do {    \
     if (NMIIrqIsOn == 0) { \
         vPortEnterCritical();   \