IOAPIC_IRQI_FLAG_LEVEL
info->io_flags &= ~IOAPIC_IRQI_FLAG_LEVEL;
info->io_flags |= IOAPIC_IRQI_FLAG_LEVEL;
info->io_flags |= IOAPIC_IRQI_FLAG_LEVEL;
ASSYM(IOAPIC_IRQI_FLAG_LEVEL, IOAPIC_IRQI_FLAG_LEVEL);