update GetPerformanceCounterProperties() declare

[mirror_edk2.git] / MdePkg / Library / BaseTimerLibLocalApic / Ipf / IpfTimerLib.c

diff --git a/MdePkg/Library/BaseTimerLibLocalApic/Ipf/IpfTimerLib.c b/MdePkg/Library/BaseTimerLibLocalApic/Ipf/IpfTimerLib.c
index 800b5258e38a1dee7867b91b2238a7ae5bff18ab..12803d9fa4120a858a0342032f7636573540d284 100644 (file)
--- a/MdePkg/Library/BaseTimerLibLocalApic/Ipf/IpfTimerLib.c
+++ b/MdePkg/Library/BaseTimerLibLocalApic/Ipf/IpfTimerLib.c
@@ -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