linux-kernel - Re: [PATCH] Make WARN_ON/WARN_ON_ONCE no-ops when CONFIG

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Date:	Sat, 15 Dec 2007 14:34:42 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Make WARN_ON/WARN_ON_ONCE no-ops when CONFIG_BUG is off

On Sat, Dec 15, 2007 at 05:31:30PM +1100, Benjamin Herrenschmidt wrote:
>
> That's something I've actually never quite liked... the fact that we
> evaluate the expression anyway. I'm pretty happy with -not- evaluating
> the expression when CONFIG_BUG is on most of the time since whatever is
> in there is purely here for the sake of the BUG/WARN test.

Whether we evaluate the expression is a completely different debate.
I personally agree with you that expressions that have side-effects
are a stupid idea for either WARN_ON or BUG_ON.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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