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diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/PrivilegePolymorphic.h b/MdeModulePkg/Universal/Variable/RuntimeDxe/PrivilegePolymorphic.h
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+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/PrivilegePolymorphic.h
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+/** @file
+  Polymorphic functions that are called from both the privileged driver (i.e.,
+  the DXE_SMM variable module) and the non-privileged drivers (i.e., one or
+  both of the DXE_RUNTIME variable modules).
+
+  Each of these functions has two implementations, appropriate for privileged
+  vs. non-privileged driver code.
+
+  Copyright (c) 2017, Red Hat, Inc.<BR>
+  Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
+
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#ifndef _PRIVILEGE_POLYMORPHIC_H_
+#define _PRIVILEGE_POLYMORPHIC_H_
+
+#include <Uefi/UefiBaseType.h>
+
+/**
+  SecureBoot Hook for auth variable update.
+
+  @param[in] VariableName                 Name of Variable to be found.
+  @param[in] VendorGuid                   Variable vendor GUID.
+**/
+VOID
+EFIAPI
+SecureBootHook (
+  IN CHAR16                                 *VariableName,
+  IN EFI_GUID                               *VendorGuid
+  );
+
+#endif