Re: [patch 4/21] fix ARCH_HAS_PREFETCH

Alan Cox (alan@lxorguk.ukuu.org.uk)
15 Aug 2002 02:23:54 +0100

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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