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Date:	Fri, 7 Dec 2007 15:54:30 +0100
From:	Andi Kleen <>
To:	"David P. Reed" <>
Cc:	Andi Kleen <>,,
	Thomas Gleixner <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>
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.

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