irq identification has changed from 2.6.10 to 2.6.23. an explanation is requested

[Eno 3 Compton]

Dear All,

I had a driver working under 2.6.10 on a mpc8248. The kernel got changed
under me to 2.6.23. Now, when I call request_irq with SIU_INT_IRQ5, which is
defined in asm-powerpc/irq.h, and once compiled and worked properly, I get
compilation errors. The compiler can't find the symbol definition because
CONFIG_PPC_MERGE  is defined. I suspect the kernel guys have migrated things
to a new arrangement, which I've been unable to discern.

An explanation or advice on where to find information about this would be
hugely appreciated.

Eno Compton
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