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Date: Tue, 10 Jan 2012 09:44:50 +0100 From: Richard Cochran <richardcochran@...il.com> To: "Keller, Jacob E" <jacob.e.keller@...el.com> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "e1000-devel@...ts.sourceforge.net" <e1000-devel@...ts.sourceforge.net>, "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>, "Ronciak, John" <john.ronciak@...el.com>, John Stultz <john.stultz@...aro.org>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH net-next V3 1/2] igb: add PTP Hardware Clock code On Mon, Jan 09, 2012 at 05:42:20PM +0000, Keller, Jacob E wrote: > Is there a reason for not using the timecounter structure from the > kernel? It is a layer beneath the timecompare code which is meant to > handle this condition. As far as I can tell this issue is solved in > the timecounter code. If it is not, then that should be a bug in the > timecounter cyclecounter code. I don't know if this issue occurs in > the timecounter structure because it handles the ns conversion > differently. My only reason is that I am not sure that the timecounter code really does what we need. It might well work. Consider, though, that the 82580 register does not overflow in the usual way. The upper 24 bits are always zero. What I wrote does the right thing, I think. However, duplicated effort is always bad, so can you show me how to change it? Thanks, Richard -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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