From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Wed, 24 Jul 2002 18:21:07 -0700 (PDT)
From: Linus Torvalds <torvalds@transmeta.com>
Subject: Re: [PATCH] updated low-latency zap_page_range
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To: Robert Love <rml@tech9.net>
Cc: Andrew Morton <akpm@zip.com.au>, riel@conectiva.com.br, linux-kernel@vger.kernel.org, linux-mm@kvack.org
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On 24 Jul 2002, Robert Love wrote:
>
> 	if (preempt_count() == 1 && need_resched())
>
> Then we get "if (0 && ..)" which should hopefully be evaluated away.

I think preempt_count() is not unconditionally 0 for non-preemptible
kernels, so I don't think this is a compile-time constant.

That may be a bug in preempt_count(), of course.

		Linus

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