From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arun Sharma <arun.sharma@intel.com>
Subject: Re: [PATCH] pci-ioapic-0502.patch
Date: Wed, 04 May 2005 18:31:56 -0700
Message-ID: <4279778C.5020207@intel.com>
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To: "Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@unisys.com>
Cc: xen-devel@lists.xensource.com, "Vessey, Bruce A" <Bruce.Vessey@unisys.com>, "Subrahmanian, Raj" <raj.subrahmanian@unisys.com>
List-Id: xen-devel@lists.xenproject.org

Puthiyaparambil, Aravindh wrote:

> IOAPIC[0]: Invalid reference to IRQ 0
> 
> I am not even sure if this is an error. I have attached the complete
> boot sequence.
> 

I think this is because io_apic_irqs is not getting initialized 
properly. My next patch will contain something like:

void __init setup_IO_APIC(void)
{
        if (acpi_ioapic)
                 io_apic_irqs = ~0;      /* all IRQs go through IOAPIC */
         else
                 io_apic_irqs = ~PIC_IRQS;
}

which should hopefully take care of this apparently harmless message.

	-Arun