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diff --git a/MdeModulePkg/Core/Dxe/Event/ExecData.c b/MdeModulePkg/Core/Dxe/Event/ExecData.c
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+/** @file
+
+ Event data is declared in this file.
+
+Copyright (c) 2006 - 2008, Intel Corporation
+All rights reserved. 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.
+
+**/
+
+#include <DxeMain.h>
+
+
+//
+// gTpl - Task priority level
+//
+EFI_TPL gEfiCurrentTpl = TPL_APPLICATION;
+
+
+//
+// gEventQueueLock - Protects the event queus
+//
+EFI_LOCK gEventQueueLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL);
+
+//
+// gEventQueue - A list of event's to notify for each priority level
+// gEventPending - A bitmask of the EventQueues that are pending
+//
+LIST_ENTRY gEventQueue[TPL_HIGH_LEVEL + 1];
+UINTN gEventPending = 0;
+
+
+//
+// gEventSignalQueue - A list of events to signal based on EventGroup type
+//
+LIST_ENTRY gEventSignalQueue = INITIALIZE_LIST_HEAD_VARIABLE (gEventSignalQueue);
+