linux-kernel - Re: [alsa-devel] [PATCH] Make snd_BUG_ON() always evaluate and return the conditional expression.

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Date:	Wed, 06 Mar 2013 14:49:28 +0100
From:	David Henningsson <david.henningsson@...onical.com>
To:	Christine Spang <christine.spang@...cle.com>
CC:	Takashi Iwai <tiwai@...e.de>, Sasha Levin <sasha.levin@...cle.com>,
	alsa-devel@...a-project.org, Jamie Iles <jamie.iles@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] Make snd_BUG_ON() always evaluate and return
 the conditional expression.

2013-03-05 21:41, Christine Spang skrev:
> On 03/05/2013 04:05 AM, Takashi Iwai wrote:
>> At Mon,  4 Mar 2013 17:02:59 -0500,
>> Christine Spang wrote:
>>> Having snd_BUG_ON() only evaluate its conditional when CONFIG_SND_DEBUG
>>> is set leads to frequent bugs, since other similar macros in the kernel
>>> have different behavior. Let's make snd_BUG_ON() act like those macros
>>> so it will stop being accidentally misused.
>>>
>>> Signed-off-by: Christine Spang <christine.spang@...cle.com>
>> Sounds reasonable.  The dependency on CONFIG_SND_DEBUG was for
>> allowing more optimization, but since we use this for more places than
>> expected, this change would be safer indeed.
>>
>> If no one has objection, I'll apply it for 3.10 kernel.

If snd_BUG_ON now works like WARN_ON rather than BUG_ON (at least it 
does with this change, if I understand things right), maybe we should 
rename it to snd_WARN_ON for consistency?


-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic

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