linux-kernel - Re: [PATCH] Skip looking for ioapic overrides when ioapics are not present

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Date:	Sat, 02 Oct 2010 07:45:21 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Avinash Kurup <kurup.avinash@...il.com>
Subject: Re: [PATCH] Skip looking for ioapic overrides when ioapics are not present

"H. Peter Anvin" <hpa@...or.com> writes:

> On 06/05/2010 08:56 PM, Eric W. Biederman wrote:
>> 
>> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
>> index 33f3563..226a6d1 100644
>> --- a/arch/x86/kernel/apic/io_apic.c
>> +++ b/arch/x86/kernel/apic/io_apic.c
>> @@ -4066,6 +4066,9 @@ int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity)
>>  {
>>  	int ioapic, pin, idx;
>>  
>> +	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
>> +		return -1;
>> +
>>  	if (skip_ioapic_setup)
>>  		return -1;
>>  
>
> I was just poked about this patch... it doesn't build "make allnoconfig"
> on x86-64.
>
> This is also a bugzilla ticket now:
> https://bugzilla.kernel.org/show_bug.cgi?id=17772

That sucks.  Do we need to move this function into an acpi specific
file to pass allnonconfig?

Barring crazy build issues the fix is right.

I'm not certain when I will get a chance to look at build issues
as my load spiked considerably.

Eric
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