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Subject: Re: [patch 4/21] fix ARCH_HAS_PREFETCH
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Willy Tarreau <willy@w.ods.org>, Rogier Wolff <R.E.Wolff@BitWizard.nl>,
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On Wed, 2002-08-14 at 21:58, H. Peter Anvin wrote:
> 
> Since some processors now have "busy wait delay" instructions, this
> would also make it possible to do:

Nobody should be using an empty busy loop. If its a short timed busy
loop then they should be using udelay, if its a long one
schedule_timeout()

If its polling hardware then it isnt an empty loop

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