From c414dc219ed78641887874c97992589a0366bd79 Mon Sep 17 00:00:00 2001
From: Shubham Kulkarni <shubham.kulkarni@espressif.com>
Date: Thu, 16 Sep 2021 14:29:22 +0530
Subject: [PATCH] Xtensa_ESP32: Add definition for portMEMORY_BARRIER

This fixes crash observed in Amazon FreeRTOS when optimisations are enabled
---
 portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h b/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
index 32a7959af8..080e7c6f9d 100644
--- a/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
+++ b/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h
@@ -554,6 +554,10 @@
         #define configASSERT( x )    if( !( x ) ) { porttracePrint( -1 ); printf( "\nAssertion failed in %s:%d\n", __FILE__, __LINE__ ); exit( -1 ); }
     #endif
 
+/* Barriers */
+    #define portMEMORY_BARRIER()    __asm volatile ( "" ::: "memory" )
+
+
 #endif // __ASSEMBLER__
 
 /* *INDENT-OFF* */