Re: [PATCH 13/14] x86_64 irq: Safely cleanup an irq after moving it.

[Eric W. Biederman]

Mika Penttilä <mika.penttila@xxxxxxxxxxx> writes:

> Eric W. Biederman wrote:
>>   * Vectors 0x20-0x2f are used for ISA interrupts.
>>   */
>> -#define IRQ0_VECTOR		FIRST_EXTERNAL_VECTOR
>> +#define IRQ0_VECTOR		FIRST_EXTERNAL_VECTOR + 0x10
>>  #define IRQ1_VECTOR		IRQ0_VECTOR + 1
>>  #define IRQ2_VECTOR		IRQ0_VECTOR + 2
>>  #define IRQ3_VECTOR		IRQ0_VECTOR + 3
>> @@ -82,7 +87,7 @@
>>
> I think we have a dependency in i8259.c that irq0 is mapped to vector 0x20.

We did, but I'm pretty certain I removed it when I introduced the
IRQ[0-15]_VECTOR defines.

One of my test machines seems to be delivering irq0 in EXTInt mode
with this patch applied (a bug of another flavor) so I don't think
there is a real issue here.

Eric
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