diff --git a/MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.c b/MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.c
index 67052b20b3..746c27180f 100644
--- a/MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.c
+++ b/MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.c
@@ -1749,8 +1749,6 @@ ConSplitterGrowBuffer (
   IN OUT  VOID                        **Buffer
   )
 {
-  UINTN NewSize;
-  UINTN OldSize;
   VOID  *Ptr;
 
   //
@@ -1758,23 +1756,16 @@ ConSplitterGrowBuffer (
   // copy the old buffer's content to the new-size buffer,
   // then free the old buffer.
   //
-  OldSize = *Count * SizeOfCount;
   *Count += CONSOLE_SPLITTER_CONSOLES_ALLOC_UNIT;
-  NewSize = *Count * SizeOfCount;
-
-  Ptr     = AllocateZeroPool (NewSize);
+  Ptr = ReallocatePool (
+          SizeOfCount * ((*Count) - CONSOLE_SPLITTER_CONSOLES_ALLOC_UNIT), 
+          SizeOfCount * (*Count),
+          *Buffer
+          );
   if (Ptr == NULL) {
     return EFI_OUT_OF_RESOURCES;
   }
-
-  CopyMem (Ptr, *Buffer, OldSize);
-
-  if (*Buffer != NULL) {
-    FreePool (*Buffer);
-  }
-
   *Buffer = Ptr;
-
   return EFI_SUCCESS;
 }
 
diff --git a/MdeModulePkg/Universal/DevicePathDxe/DevicePathToText.c b/MdeModulePkg/Universal/DevicePathDxe/DevicePathToText.c
index a9f6afcf4a..5de21b1f9d 100644
--- a/MdeModulePkg/Universal/DevicePathDxe/DevicePathToText.c
+++ b/MdeModulePkg/Universal/DevicePathDxe/DevicePathToText.c
@@ -14,41 +14,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include "DevicePath.h"
 
-/**
-  Adjusts the size of a previously allocated buffer.
-
-  @param OldPool         A pointer to the buffer whose size is being adjusted.
-  @param OldSize         The size of the current buffer.
-  @param NewSize         The size of the new buffer.
-
-  @return A pointer to the new buffer or NULL if allocation fails.
-
-**/
-VOID *
-ReallocatePool (
-  IN VOID                 *OldPool,
-  IN UINTN                OldSize,
-  IN UINTN                NewSize
-  )
-{
-  VOID  *NewPool;
-
-  NewPool = NULL;
-  if (NewSize != 0) {
-    NewPool = AllocateZeroPool (NewSize);
-  }
-
-  if (OldPool != NULL) {
-    if (NewPool != NULL) {
-      CopyMem (NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);
-    }
-
-    FreePool (OldPool);
-  }
-
-  return NewPool;
-}
-
 /**
   Concatenates a formatted unicode string to allocated pool. The caller must
   free the resulting buffer.
@@ -90,9 +55,9 @@ CatPrint (
     Size = StrSize (AppendStr) - sizeof (UINT16);
     Size = Size + StrSize (Str->Str);
     Str->Str = ReallocatePool (
-                Str->Str,
                 StrSize (Str->Str),
-                Size
+                Size,
+                Str->Str
                 );
     ASSERT (Str->Str != NULL);
   }
@@ -1752,7 +1717,7 @@ ConvertDeviceNodeToText (
   // Shrink pool used for string allocation
   //
   NewSize = (Str.Len + 1) * sizeof (CHAR16);
-  Str.Str = ReallocatePool (Str.Str, NewSize, NewSize);
+  Str.Str = ReallocatePool (NewSize, NewSize, Str.Str);
   ASSERT (Str.Str != NULL);
   Str.Str[Str.Len] = 0;
   return Str.Str;
@@ -1841,7 +1806,7 @@ ConvertDevicePathToText (
   }
 
   NewSize = (Str.Len + 1) * sizeof (CHAR16);
-  Str.Str = ReallocatePool (Str.Str, NewSize, NewSize);
+  Str.Str = ReallocatePool (NewSize, NewSize, Str.Str);
   ASSERT (Str.Str != NULL);
   Str.Str[Str.Len] = 0;
   return Str.Str;
diff --git a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
index 037c8cc4f3..ee5f1140dc 100644
--- a/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
+++ b/MdeModulePkg/Universal/HiiDatabaseDxe/ConfigRouting.c
@@ -270,44 +270,6 @@ OutputConfigBody (
 
 }
 
-
-/**
-  Adjusts the size of a previously allocated buffer.
-
-
-  @param OldPool         A pointer to the buffer whose size is being adjusted.
-  @param OldSize         The size of the current buffer.
-  @param NewSize         The size of the new buffer.
-
-  @return The new buffer allocated.
-
-**/
-VOID *
-ReallocatePool (
-  IN VOID                          *OldPool,
-  IN UINTN                         OldSize,
-  IN UINTN                         NewSize
-  )
-{
-  VOID  *NewPool;
-
-  NewPool = NULL;
-  if (NewSize != 0) {
-    NewPool = AllocateZeroPool (NewSize);
-  }
-
-  if (OldPool != NULL) {
-    if (NewPool != NULL) {
-      CopyMem (NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);
-    }
-
-    FreePool (OldPool);
-  }
-
-  return NewPool;
-}
-
-
 /**
   Append a string to a multi-string format.
 
@@ -346,9 +308,9 @@ AppendToMultiString (
   if (MultiStringSize + AppendStringSize > MAX_STRING_LENGTH ||
       MultiStringSize > MAX_STRING_LENGTH) {
     *MultiString = (EFI_STRING) ReallocatePool (
-                                  (VOID *) (*MultiString),
                                   MultiStringSize,
-                                  MultiStringSize + AppendStringSize
+                                  MultiStringSize + AppendStringSize,
+                                  (VOID *) (*MultiString)
                                   );
   }