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[Xen-devel] Re: [PATCH 1/5] xen: events: use irq_alloc_desc(_at) instead

To: "H. Peter Anvin" <hpa@xxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH 1/5] xen: events: use irq_alloc_desc(_at) instead of open-coding an IRQ allocator.
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 25 Oct 2010 16:21:43 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Campbell <ian.campbell@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, mingo@xxxxxxx, tglx@xxxxxxxxxxxxx
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 On 10/25/2010 04:05 PM, H. Peter Anvin wrote:
> On 10/25/2010 04:03 PM, Jeremy Fitzhardinge wrote:
>> What?  Why?  How?  Surely if we're asking the irq subsystem to allocate
>> us an irq, it will return a fresh never-before-used (and certainly not
>> shared) irq?  Shared irqs only make sense if multiple devices are
>> actually sharing, say, a wire on the board.
>>
>> Or am I missing something?
>>
> I think the number is not necessarily "never before used", but rather
> "not currently used".

Yeah, that's what I meant.

    J

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