PCB
if (size < sizeof (PCB)) {
size = sizeof (PCB);
mb->un.varCfgPort.pcbLen = sizeof (PCB);
sizeof (PCB));
sizeof (PCB), DDI_DMA_SYNC_FORDEV);
if (sizeof (PCB) != size) {
DRIVER_NAME, ddiinst, (int)sizeof (PCB), PCB_SIZE);
PCB pcb;