Re: RFC [PATCH] x86: introduce nr_irqs for 64bit

[Yinghai Lu]

On Wed, Jul 30, 2008 at 3:09 AM, Ingo Molnar <mingo@xxxxxxx> wrote:
>
> * Yinghai Lu <yhlu.kernel@xxxxxxxxx> wrote:
>
>> add DEFINE_DYN_ARRAY for dynamical array support
>>
>> todo:
>> 1. convert x86 32bit and other arch
>> 2. nr_irqs auto probe via acpi_oem_check?
>>
>> Signed-off-by: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
>
> wonderful!
>
> I have one main structural suggestion: could we please keep the NR_IRQS
> name, and just change it to dynamic on x86? NR_IRQS is used in 540
> places in the kernel, there's no point in touching all that code.
>
> Also add an CONFIG_ARCH_HAS_DYNAMIC_NR_IRQS switch, define it in
> arch/x86/Kconfig and use it in include/linux/irq.h.
>
> This will create far less migration pain than the widespread rename.
> That will also solve the "what about the other architectures" question.

just send out v2.

long term, i hope to make all arch to use nr_irqs and probe it
earlier. and kill NR_IRQS

YH
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