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Date: Fri, 20 Feb 2004 21:43:11 +0200
From: =?ISO-8859-1?Q?Mika_Penttil=E4?= <mika.penttila@kolumbus.fi>
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To: "Nguyen, Tom L" <tom.l.nguyen@intel.com>
CC: Andreas Schwab <schwab@suse.de>, greg@kroah.com,
       linux-kernel@vger.kernel.org, "Nakajima, Jun" <jun.nakajima@intel.com>,
       "Luck, Tony" <tony.luck@intel.com>
Subject: Re: [PATCH]2.6.3-rc2 MSI Support for IA64
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Nguyen, Tom L wrote:

>Friday, Feb. 20, 2004 10:58 AM, Mika Penttilä wrote:
>
>  
>
>>ia64 already has a function ia64_alloc_vector(void) in 
>>arch/ia64/kernel/irq_ia64, why the doubling?
>>    
>>
>
>+#ifndef CONFIG_PCI_USE_VECTOR
> int
> ia64_alloc_vector (void)
> {
>@@ -67,6 +68,7 @@
> 		panic("ia64_alloc_vector: out of interrupt vectors!");
> 	return next_vector++;
> }
>+#endif
>
>#ifndef CONFIG_PCI_USE_VECTOR is added in arch/ia64/kernel/irq_ia64.c
>as above to avoid the double definement of ia64_alloc_vector(void).
>Setting CONFIG_PCI_USE_VECTOR to 'Y' by enabling MSI support will
>use function ia64_alloc_vector(void) defined in drivers/pci/msi.c.
>The main reason behind it is to keep track of the number of vectors
>already assigned during the runtime. Keeping track of already assigned
>vectors is required in MSI implementation.
>
>Thanks,
>Long 
>
>  
>
I see, thanks

--Mika