MdeModulePkg: stop abusing EFI_EVENT for protocol notify registration

EfiCreateProtocolNotifyEvent() takes a (VOID**) for "Registration",
similarly to gBS->RegisterProtocolNotify(). We should pass the address of
an actual pointer-to-VOID, and not the address of an EFI_EVENT. EFI_EVENT
just happens to be specified as (VOID*), and has nothing to do with the
registration.

The same applies to gMmst->MmRegisterProtocolNotify().

"mFtwRegistration", "mFvRegistration", and "mFvbRegistration" are used for
nothing else.

This change is a no-op in practice; it's a semantic improvement.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
index 3d232bb36c..7d2b6c8e1f 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
@@ -13,7 +13,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 

 EFI_HANDLE                          mHandle                    = NULL;

 EFI_EVENT                           mVirtualAddressChangeEvent = NULL;

-EFI_EVENT                           mFtwRegistration           = NULL;

+VOID                                *mFtwRegistration          = NULL;

 VOID                                ***mVarCheckAddressPointer = NULL;

 UINTN                               mVarCheckAddressPointerCount = 0;

 EDKII_VARIABLE_LOCK_PROTOCOL        mVariableLock              = { VariableLockRequestToLock };