update GetPerformanceCounterProperties() declare
[people/mcb30/edk2.git] / edk2 / MdePkg / Library / BaseTimerLibLocalApic / Ipf / IpfTimerLib.c
index 800b525..12803d9 100644 (file)
@@ -188,8 +188,8 @@ GetPerformanceCounter (
 UINT64\r
 EFIAPI\r
 GetPerformanceCounterProperties (\r
-  IN      UINT64                    *StartValue,\r
-  IN      UINT64                    *EndValue\r
+  OUT      UINT64                    *StartValue,  OPTIONAL\r
+  OUT      UINT64                    *EndValue     OPTIONAL\r
   )\r
 {\r
   PAL_PROC_RETURN                   PalRet;\r