Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming....@intel.com>
---
 MdePkg/Library/BaseMemoryLibOptDxe/Arm/MemLibGuid.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/MdePkg/Library/BaseMemoryLibOptDxe/Arm/MemLibGuid.c 
b/MdePkg/Library/BaseMemoryLibOptDxe/Arm/MemLibGuid.c
index 8f1e50b..47386e9 100644
--- a/MdePkg/Library/BaseMemoryLibOptDxe/Arm/MemLibGuid.c
+++ b/MdePkg/Library/BaseMemoryLibOptDxe/Arm/MemLibGuid.c
@@ -15,6 +15,19 @@
 
 #include "MemLibInternals.h"
 
+/**
+  Internal function to compare two GUIDs.
+
+  This function compares Guid1 to Guid2.  If the GUIDs are identical then TRUE 
is returned.
+  If there are any bit differences in the two GUIDs, then FALSE is returned.
+
+  @param  Guid1       A pointer to a 128 bit GUID.
+  @param  Guid2       A pointer to a 128 bit GUID.
+
+  @retval TRUE        Guid1 and Guid2 are identical.
+  @retval FALSE       Guid1 and Guid2 are not identical.
+
+**/
 BOOLEAN
 EFIAPI
 InternalMemCompareGuid (
-- 
2.8.0.windows.1

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