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-rw-r--r--MdePkg/Include/Pi/PiSmmCis.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/MdePkg/Include/Pi/PiSmmCis.h b/MdePkg/Include/Pi/PiSmmCis.h
index e92bc57ffe..dc71f639be 100644
--- a/MdePkg/Include/Pi/PiSmmCis.h
+++ b/MdePkg/Include/Pi/PiSmmCis.h
@@ -60,12 +60,12 @@ EFI_STATUS
/**
Function prototype for invoking a function on an Application Processor.
- @param[in] Buffer Pointer to private data buffer.
+ @param[in,out] Buffer Pointer to private data buffer.
**/
typedef
VOID
(EFIAPI *EFI_AP_PROCEDURE)(
- IN VOID *Buffer
+ IN OUT VOID *Buffer
);
/**