From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Brown <broonie@kernel.org>
Subject: Re: [RFC PATCH 1/2] regmap: add configurable lock class key for
 lockdep
Date: Thu, 25 Jun 2015 15:29:08 +0100
Message-ID: <20150625142908.GN14071@sirena.org.uk>
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To: Arjan van de Ven <arjan@linux.intel.com>
Cc: Nicolas Boichat <drinkcat@chromium.org>, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, Antti Palosaari <crope@iki.fi>, Ingo Molnar <mingo@redhat.com>, Lars-Peter Clausen <lars@metafoo.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org, Bard Liao <bardliao@realtek.com>, Oder Chiou <oder_chiou@realtek.com>, Liam Girdwood <lgirdwood@gmail.com>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>, alsa-devel@alsa-project.org, Anatol Pomozov <anatol.pomozov@gmail.com>
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On Thu, Jun 25, 2015 at 06:21:43AM -0700, Arjan van de Ven wrote:

Please fix your mailer to word wrap within paragraphs.

> wouldn't it be better to use the mutex_lock_nested() and co to
> explicitly express your hierarchy?

That was one of my original suggestions - one of the problems with this
code is that it's very much been presented as "here's the solution", it
took a long time to even discover the problem they were trying to solve.
I don't know exactly what the issue is supposed to be here, AFAICT the
answers were about lock classes not about subclasses because apparently
it's essential that we use lock classes.

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