PCI_SEC_LATENCY_TIMER_MASK
buses & PCI_SEC_LATENCY_TIMER_MASK);
buses = (buses & PCI_SEC_LATENCY_TIMER_MASK) |
buses & PCI_SEC_LATENCY_TIMER_MASK);
buses = (buses & PCI_SEC_LATENCY_TIMER_MASK) |
buses &= ~PCI_SEC_LATENCY_TIMER_MASK;
buses |= FIELD_PREP(PCI_SEC_LATENCY_TIMER_MASK, CARDBUS_LATENCY_TIMER);