linux-kernel - Re: [PATCH] Fix WARN_ON / WARN_ON

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Date:	Tue, 03 Oct 2006 16:47:43 -0700
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	herbert@...dor.apana.org.au, akpm@...l.org,
	linux-kernel@...r.kernel.org, leonid.i.ananiev@...el.com
Subject: Re: [PATCH] Fix WARN_ON / WARN_ON_ONCE regression

On Tue, 2006-10-03 at 17:06 -0700, Jeremy Fitzhardinge wrote:

> How does the generated code change?  Doesn't evaluating the condition 
> multiple times have the potential to cause problems?
> 

I think if the condition changes between two evaluations, we do have a
problem with my fix.  I don't have a better idea to avoid using a local
variable to store the condition.  I think we should at least reverse the
WARN_ON/WARN_ON_ONCE patch if a better way cannot be found.

Tim
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