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From: David Brownell <david-b@pacbell.net>
To: linux-pm@lists.linux-foundation.org
Cc: Pavel Machek <pavel@ucw.cz>,
	Anton Vorontsov <cbouatmailru@gmail.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [linux-pm] [PATCH RFC] introduce pm_call() macro to get rid of most	#ifdef CONFIG_PM
Date: Mon, 3 Mar 2008 14:56:38 -0800	[thread overview]
Message-ID: <200803031456.38406.david-b@pacbell.net> (raw)
In-Reply-To: <20080303141818.GE12606@elf.ucw.cz>

On Monday 03 March 2008, Pavel Machek wrote:
> > +/* avoid `defined but not used' warning */
> > +#define pm_call(x) ((x) - 1 ? NULL : NULL)
> > +#endif /* CONFIG_PM */
> > +
> 
> This is evil.

Ugly, yes.  It might merit some casts too.


> Maybe your gcc is smart enough to optimize this away, 
> but I'm not sure mine is.

It'll be a constant expression; it certainly ought to be.


  parent reply	other threads:[~2008-03-03 22:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-02 23:43 Anton Vorontsov
2008-03-03  0:08 ` Arjan van de Ven
2008-03-03  0:29   ` Rafael J. Wysocki
2008-03-03 23:26   ` Anton Vorontsov
2008-03-03 14:18 ` Pavel Machek
2008-03-03 22:42   ` Anton Vorontsov
2008-03-03 22:56   ` David Brownell [this message]
2008-03-03 23:16     ` [linux-pm] " Pavel Machek

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