[RFC PATCH 1/3] [ARM] allow NR_IRQS to be larger than 256

[Eric Miao]

On Thu, Feb 4, 2010 at 12:05 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Thu, Feb 04, 2010 at 08:29:52PM +0100, Gilles Chanteperdrix wrote:
>> Eric Miao wrote:
>> > -#if NR_IRQS > 256
>> > +#if NR_IRQS > 512
>> > +#define HARDIRQ_BITS       10
>> > +#elif NR_IRQS > 256
>> >  #define HARDIRQ_BITS       9
>> >  #else
>> >  #define HARDIRQ_BITS       8
>>
>> Would not it be possible to use
>>
>> #define HARDIRQ_BITS order_base_2(NR_IRQS)
>
> HARDIRQ_BITS must be a preprocessor constant.
>

Confirmed, log_order_2() won't compile.