Add xQueueGetMutexHolder() to MPU functions.

FreeRTOS/Source/include/mpu_wrappers.h

@@ -117,6 +117,7 @@ only for ports that are using the MPU. */
 		#define xQueueAddToSet					MPU_xQueueAddToSet
 		#define xQueueRemoveFromSet				MPU_xQueueRemoveFromSet
 		#define xQueuePeekFromISR				MPU_xQueuePeekFromISR
+		#define xQueueGetMutexHolder			MPU_xQueueGetMutexHolder
 
 		#define pvPortMalloc					MPU_pvPortMalloc
 		#define vPortFree						MPU_vPortFree

FreeRTOS/Source/portable/GCC/ARM_CM3_MPU/port.c

@@ -216,6 +216,7 @@ QueueSetMemberHandle_t MPU_xQueueSelectFromSet( QueueSetHandle_t xQueueSet, Tick
 BaseType_t MPU_xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet );
 BaseType_t MPU_xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet );
 BaseType_t MPU_xQueuePeekFromISR( QueueHandle_t xQueue, void * const pvBuffer );
+void* MPU_xQueueGetMutexHolder( QueueHandle_t xSemaphore );
 
 /*-----------------------------------------------------------*/
 
@@ -1016,6 +1017,17 @@ BaseType_t xReturn;
 }
 /*-----------------------------------------------------------*/
 
+void* MPU_xQueueGetMutexHolder( QueueHandle_t xSemaphore )
+{
+BaseType_t xRunningPrivileged = prvRaisePrivilege();
+void * xReturn;
+
+	xReturn = ( void * ) xQueueGetMutexHolder( xSemaphore );
+	portRESET_PRIVILEGE( xRunningPrivileged );
+	return xReturn;
+}
+/*-----------------------------------------------------------*/
+
 #if ( configUSE_MUTEXES == 1 )
 	QueueHandle_t MPU_xQueueCreateMutex( void )
 	{