[PATCH] irq: move some interrupt arch_* functions into struct irq_chip.

[Michael Ellerman]

On Wed, 2010-03-10 at 10:55 +0000, ijc at hellion.org.uk wrote:
> From: Ian Campbell <ian.campbell at citrix.com>
> 
> Move arch_init_copy_chip_data and arch_free_chip_data into function
> pointers in struct irq_chip since they operate on irq_desc->chip_data.
> 
> arch_init_chip_data cannot be moved into struct irq_chip at this time
> because irq_desc->chip is not known at the time the irq_desc is
> setup. For now rename arch_init_chip_data to arch_init_irq_desc (for
> PowerPC, the only other user, whose usage better matches the new name)
> and on x86 convert arch_init_chip_data to ioapic_init_chip_data and
> call this whenever the IO APIC code allocates a new IRQ.

Ack on the name change, it should be called arch_init_irq_desc(), the
existing name clearly comes from the fact that sparse IRQ was
implemented first on x86, and on x86 that routine init's the chip data
for a new irq_desc.

But semantically arch_init_irq_desc() is the right name, I was just too
lazy to change it when I enabled sparse IRQ for powerpc.

Can't comment on the rest of the patch.

cheers

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