APIC misconfiguration

Hello everyone

I'm trying to create touchscreen driver for Wibrain UMPC. I found out that device doesn't emit interrupts
until I switch polarity field in IO_APIC_route_entry. To do this, I need to export ioapic_read_entry and
ioapic_write_entry symbols from arch/x86/kernel/io_apic_{32,64}.c
Is there any other (better) way to do this?

Thanks,
   Andrey