Detecting x86 SMP on a UP kernel

Hi, I need to be able to detect underlying x86 SMP hardware when running a UP kernel, from a module.

This is to avoid trashing the APIC setup on SMP hardware (normally I have to enable the APIC, re-do the fixmap etc. so I can use the local APIC with a stock kernel).

I don't want to require a kernel patch if possible (I suppose just EXPORT_SYMBOL(smp_found_config) would do ...).

So can someone give me a hint on how I can detect underlying SMP hardware ?

I wouldn't need to do this if the ac tree APIC patches were in the kernel btw

thanks
john

"I'd rather be rudely informed than politely left in the dark."