B_NO_LOCK_VECTOR
install_io_interrupt_handler(0xfd - ARCH_INTERRUPT_BASE, &x86_ici_interrupt, NULL, B_NO_LOCK_VECTOR);
install_io_interrupt_handler(0xfe - ARCH_INTERRUPT_BASE, &x86_smp_error_interrupt, NULL, B_NO_LOCK_VECTOR);
install_io_interrupt_handler(0xff - ARCH_INTERRUPT_BASE, &x86_spurious_interrupt, NULL, B_NO_LOCK_VECTOR);
&apic_timer_interrupt, NULL, B_NO_LOCK_VECTOR);
NULL, B_NO_LOCK_VECTOR);
if (flags & B_NO_LOCK_VECTOR)