[PATCH 1/3] Implement arch disable/enable irq hooks.

[Scott Wood]

Paul Mackerras wrote:
> It might be better to use hard_irq_disable rather than
> local_irq_disable here, since I think we will need that on 64-bit (and
> on 32-bit if we ever do lazy irq disabling there).

OK.

>> +/* Overrides the weak version in kernel/power/main.c */
>> +void arch_suspend_disable_irqs(void)
>> +{
>> +	if (ppc_md.suspend_disable_irqs)
>> +		ppc_md.suspend_disable_irqs();
>> +	else
>> +		generic_suspend_disable_irqs();
> 
> Any particular reason why we need a ppc_md hook here?  Do we expect
> some platform to need to do something different?

Not that I know the details of, but others requested it.

-Scott