linux-kernel - Re: [PATCH -tip] pcm_native: label out defined but not used

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Message-ID: <20081001083224.GC31009@elte.hu>
Date:	Wed, 1 Oct 2008 10:32:24 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Steven Noonan <steven@...inklabs.net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -tip] pcm_native: label out defined but not used


* Takashi Iwai <tiwai@...e.de> wrote:

> At Wed, 1 Oct 2008 09:59:21 +0200,
> Ingo Molnar wrote:
> > 
> > 
> > (Cc:-ed Taskashi for this ALSA cleanup patch.)
> 
> This label is used when the debug option is enabled.

ah, indeed:

        snd_assert(substream != NULL, goto out);

if then i'd suggest to clean it up like this:

        if (snd_assert(substream != NULL))
		goto out;

this is how DEBUG_LOCKS_WARN_ON() is used in kernel/lockdep.c for 
example. Putting code flow side-effects into debug macros looks a bit 
weird.

	Ingo
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