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Message-ID: <20071207145430.GA5992@one.firstfloor.org> Date: Fri, 7 Dec 2007 15:54:30 +0100 From: Andi Kleen <andi@...stfloor.org> To: "David P. Reed" <dpreed@...d.com> Cc: Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com> Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops > My machine in question, for example, needs no waiting within CMOS_READs > at all. And I doubt any other chip/device needs waiting that isn't I don't know about CMOS, but there were definitely some not too ancient systems (let's say not more than 10 years) who required IO delays in the floppy driver and the 8253/8259. But on those the jumps are already far too fast. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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