Function IoCreateSystemThread 

pub unsafe extern "C" fn IoCreateSystemThread(
    IoObject: PVOID,
    ThreadHandle: PHANDLE,
    DesiredAccess: ULONG,
    ObjectAttributes: POBJECT_ATTRIBUTES,
    ProcessHandle: HANDLE,
    ClientId: PCLIENT_ID,
    StartRoutine: PKSTART_ROUTINE,
    StartContext: PVOID,
) -> NTSTATUS