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Subject: Re: [patch 4/21] fix ARCH_HAS_PREFETCH
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Andrew Morton <akpm@zip.com.au>
Cc: Linus Torvalds <torvalds@transmeta.com>,
       lkml <linux-kernel@vger.kernel.org>
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Date: 11 Aug 2002 20:49:56 +0100
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On Sun, 2002-08-11 at 08:38, Andrew Morton wrote:
> This information loss is unfortunate.  Examples:
> 
> 	for (i = 0; i < N; i++)
> 		prefetch(foo[i]);
> 
>    Problem is, if `prefetch' is a no-op, the compiler will still
>    generate an empty busy-wait loop.  Which it must do. 

Why - nothing there is volatile


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