linux-kernel - Re: [PATCH 09/11] pps: low level IRQ timestamps recording.

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Date:	Fri, 04 Dec 2009 22:46:19 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 09/11] pps: low level IRQ timestamps recording.

On 12/03/2009 04:01 AM, Rodolfo Giometti wrote:
>
> I see, that's why I propose my patches to you: in order to have some
> feedbacks for better solutions. :)
>
> Can I add a IRQF_TIMESTAMP in order to ask to the system to record irq
> timestamps for particular irq lines? The problem is that I cannot set
> that flag at irq_register() time but I have to do it later... it can
> be a problem?
>

Shouldn't be an issue, I don't think.  Deregistration might be an 
(minor) issue in the case of shared IRQs -- just requires some care.

	-hpa
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