(EFIAPI *EFI_CREATE_EVENT)(\r
IN UINT32 Type,\r
IN EFI_TPL NotifyTpl,\r
- IN EFI_EVENT_NOTIFY NotifyFunction,\r
- IN VOID *NotifyContext,\r
+ IN EFI_EVENT_NOTIFY NotifyFunction OPTIONAL,\r
+ IN VOID *NotifyContext OPTIONAL,\r
OUT EFI_EVENT *Event\r
);\r
\r