MdeModulePkg/StatusCodeHandlerRuntimeDxe: make global variable static
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1740 Add a 'static' storage-class specifier to the global variables that only used in a single file to minimize the name collisions. This is only for the variable named 'mExitBootServicesEvent'. Cc: Laszlo Ersek <lersek@redhat.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Hao Wu <hao.a.wu@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Dandan Bi <dandan.bi@intel.com> Signed-off-by: Zhichao Gao <zhichao.gao@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
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		@@ -2,7 +2,7 @@
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  Status Code Handler Driver which produces general handlers and hook them
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  onto the DXE status code router.
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  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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  SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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@@ -10,7 +10,7 @@
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#include "StatusCodeHandlerRuntimeDxe.h"
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EFI_EVENT                 mVirtualAddressChangeEvent = NULL;
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EFI_EVENT                 mExitBootServicesEvent     = NULL;
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static EFI_EVENT          mExitBootServicesEvent     = NULL;
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EFI_RSC_HANDLER_PROTOCOL  *mRscHandlerProtocol       = NULL;
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/**
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