intr_disable
register_t intr_disable(void);
.intr_disable = ioapic_abi_intr_disable,
.intr_disable = icu_abi_intr_disable,
.intr_disable = dummy_intr_disable,
void (*intr_disable)(int intr); /* hardware disable intr */
#define machintr_intr_disable(intr) MachIntrABI.intr_disable(intr)