X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseTimerLibLocalApic%2Fx86TimerLib.c;fp=MdePkg%2FLibrary%2FBaseTimerLibLocalApic%2Fx86TimerLib.c;h=09b614119da174b1d272aa25bfc414935249eb13;hp=dd240d88d0d10a897f94473e2387205cefee4739;hb=5117b83be8d73a9c5d15b236e57e4d194d1d9428;hpb=ed850fbf8be3c4389a4cf621a798f5113f7cba89

diff --git a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
index dd240d88d0..09b614119d 100644
--- a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
+++ b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
@@ -239,8 +239,8 @@ GetPerformanceCounter (
 UINT64
 EFIAPI
 GetPerformanceCounterProperties (
-  IN      UINT64                    *StartValue,
-  IN      UINT64                    *EndValue
+  OUT      UINT64                    *StartValue,  OPTIONAL
+  OUT      UINT64                    *EndValue     OPTIONAL
   )
 {
   UINTN                             ApicBase;