VOID __stdcall FsRtlPTeardownPerFileObjectContexts(FILE_OBJECT *FileObject){
PVOID P;
P = 0i64;
IoGetFileObjectFilterContext(FileObject, &P, 0);
if( P )
{
IoChangeFileObjectFilterContext(FileObject, P, 0);
ExFreePoolWithTag(P, 0);
}
}