// ntifs.h
VOID FsRtlAcquireFileExclusive(
PFILE_OBJECT FileObject
);
View the official Windows Driver Kit DDI referenceNo description available.
The FsRtlAcquireFileExclusive routine is reserved for system use. Do not use this routine in your driver. See FsRtlRegisterFileSystemFilterCallbacks.
FileObjectReserved.