Kernel changes:

+ Support tickless idle when configUSE_PREEMPTION is 0 (previously tickless idle was only supported when the pre-emptive scheduler was being used).
+ If a stack was statically allocated, then don't try freeing it if the TCB cannot be allocated.
+ Remove use of INCLUDE_xEventGroupsSetBitsFromISR() pre-processor macro, as it was not tested anyway.

Demo app changes:

+ Updated SAM4L Atmel Studio project to use Atmel Studio 7.

FreeRTOS/Source/portable/MSVC-MingW/portmacro.h

@@ -118,6 +118,7 @@ typedef unsigned long UBaseType_t;
 /* 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 ) return x
+#define portEND_SWITCHING_ISR( x ) portYIELD_FROM_ISR( ( x ) )
 
 void vPortCloseRunningThread( void *pvTaskToDelete, volatile BaseType_t *pxPendYield );
 void vPortDeleteThread( void *pvThreadToDelete );