> In addition, I also saw that there is a similar case on IA64 arch, but I
> can not test it. Maybe leave it there?
>
> static void
> ia64_dump_irq(int irq)
> {
>          if (symbol_exists("irq_desc") || symbol_exists("_irq_desc") ||
>              kernel_symbol_exists("irq_desc_ptrs")) {
>                  machdep->dump_irq = generic_dump_irq;
>                  return(generic_dump_irq(irq));
>          }
> ...
> }

I also cannot test ia64, but it will be needed, let's add it here too.