[sodaville] [PATCH 02/15] x86: Add device tree support

[H. Peter Anvin]

On 01/03/2011 04:20 AM, Sebastian Andrzej Siewior wrote:
> Grant Likely wrote:
>>> +extern char cmd_line[COMMAND_LINE_SIZE];
>>> +/* This number is used when no interrupt has been assigned */
>>> +#define NO_IRQ		(-1)
>>
>> 0 means NO_IRQ on x86 and most architectures.  I will change this when
>> I pick up the patch.
> 
> cat /proc/interrupts
>             CPU0
>    0:         40   IO-APIC-edge      timer
> 

0 for the timer is special.  However, Linus has declared that NO_IRQ is
to be zero, and that only very special interrupts like the PIT timer are
allowed to break that.

	-hpa