diff --git a/FreeRTOS/Source/include/FreeRTOS.h b/FreeRTOS/Source/include/FreeRTOS.h
index 28668de14..c2ebf24c3 100644
--- a/FreeRTOS/Source/include/FreeRTOS.h
+++ b/FreeRTOS/Source/include/FreeRTOS.h
@@ -257,6 +257,10 @@ hold explicit before calling the code. */
 	#define portMEMORY_BARRIER()
 #endif
 
+#ifndef portSOFTWARE_BARRIER
+	#define portSOFTWARE_BARRIER()
+#endif
+
 /* The timers module relies on xTaskGetSchedulerState(). */
 #if configUSE_TIMERS == 1
 
diff --git a/FreeRTOS/Source/portable/MSVC-MingW/port.c b/FreeRTOS/Source/portable/MSVC-MingW/port.c
index 396633123..3c685b925 100644
--- a/FreeRTOS/Source/portable/MSVC-MingW/port.c
+++ b/FreeRTOS/Source/portable/MSVC-MingW/port.c
@@ -75,7 +75,7 @@ static uint32_t prvProcessTickInterrupt( void );
  * attempt to obtain pvInterruptEventMutex if a critical section is used inside
  * an interrupt handler itself.
  */
-static volatile BaseType_t xInsideInterrupt = pdFALSE;
+volatile BaseType_t xInsideInterrupt = pdFALSE;
 
 /*
  * Called when the process exits to let Windows know the high timer resolution
@@ -394,7 +394,7 @@ CONTEXT xContext;
 		xInsideInterrupt = pdFALSE;
 		WaitForMultipleObjects( sizeof( pvObjectList ) / sizeof( void * ), pvObjectList, TRUE, INFINITE );
 
-		/* /* Cannot be in a critical section to get here.  Tasks that exist a
+		/* Cannot be in a critical section to get here.  Tasks that exist a
 		critical section will block on a yield mutex to wait for an interrupt to
 		process if an interrupt was set pending while the task was inside the
 		critical section.  xInsideInterrupt prevents interrupts that contain
diff --git a/FreeRTOS/Source/portable/MSVC-MingW/portmacro.h b/FreeRTOS/Source/portable/MSVC-MingW/portmacro.h
index 5f5412810..51b96f2fc 100644
--- a/FreeRTOS/Source/portable/MSVC-MingW/portmacro.h
+++ b/FreeRTOS/Source/portable/MSVC-MingW/portmacro.h
@@ -74,6 +74,11 @@ typedef unsigned long UBaseType_t;
 
 #define portYIELD()					vPortGenerateSimulatedInterrupt( portINTERRUPT_YIELD )
 
+
+extern volatile BaseType_t xInsideInterrupt;
+#define portSOFTWARE_BARRIER() while( xInsideInterrupt != pdFALSE )
+
+
 /* Simulated interrupts return pdFALSE if no context switch should be performed,
 or a non-zero number if a context switch should be performed. */
 #define portYIELD_FROM_ISR( x ) ( void ) x
diff --git a/FreeRTOS/Source/tasks.c b/FreeRTOS/Source/tasks.c
index 5129bf981..20044337e 100644
--- a/FreeRTOS/Source/tasks.c
+++ b/FreeRTOS/Source/tasks.c
@@ -2113,7 +2113,17 @@ void vTaskSuspendAll( void )
 	BaseType_t.  Please read Richard Barry's reply in the following link to a
 	post in the FreeRTOS support forum before reporting this as a bug! -
 	http://goo.gl/wu4acr */
+
+	/* portSOFRWARE_BARRIER() is only implemented for emulated/simulated ports that
+	do not otherwise exhibit real time behaviour. */
+	portSOFTWARE_BARRIER();
+
+	/* The scheduler is suspended if uxSchedulerSuspended is non-zero.  An increment
+	is used to allow calls to vTaskSuspendAll() to nest. */
 	++uxSchedulerSuspended;
+
+	/* Enforces ordering for ports and optimised compilers that may otherwise place
+	the above increment elsewhere. */
 	portMEMORY_BARRIER();
 }
 /*----------------------------------------------------------*/