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From: Andi Kleen <ak@suse.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Andi Kleen <ak@suse.de>,
	torvalds@osdl.org, linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: [PATCH 2/17] Generic backward compatibility includes for 4level
Date: Mon, 25 Oct 2004 19:02:16 +0200	[thread overview]
Message-ID: <20041025170216.GA9142@wotan.suse.de> (raw)
In-Reply-To: <1098723034.2798.35.camel@laptop.fenrus.org>

On Mon, Oct 25, 2004 at 06:50:34PM +0200, Arjan van de Ven wrote:
> > > 
> > > Don't we normally add do { } while (0) after empty macros which look like
> > > a function?
> > 
> > iirc Rusty tried to come up with an example some time ago where it actually 
> > made a difference, but failed. But I can change it. 
> 
> 
> if (foo) 
> 	bar(); 
> else 
> 	pml4_ERROR(x);
> something_else();

Doesn't make any difference. Try it. With a double else it may make 
a difference, but that is extremly bad style imho and better resolved
with a {}. Also you'll get a clear compile error. 

-Andi

      reply	other threads:[~2004-10-25 17:07 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-25  7:23 [PATCH 2/17] Generic backward compatibility includes for 4level Andreas Kleen
2004-10-25  9:39 ` Russell King
2004-10-25 16:06   ` Andi Kleen
2004-10-25 16:50     ` Arjan van de Ven
2004-10-25 17:02       ` Andi Kleen [this message]

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