Re: [PATCH]2.6.3-rc2 MSI Support for IA64

[Mika Penttilä]

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


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