linux-kernel - Re: [RFC PATCH 1/2] regmap: add configurable lock class key for lockdep

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Message-ID: <20150629142215.GE11162@sirena.org.uk>
Date:	Mon, 29 Jun 2015 15:22:15 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Nicolas Boichat <drinkcat@...omium.org>
Cc:	Lars-Peter Clausen <lars@...afoo.de>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Antti Palosaari <crope@....fi>, Ingo Molnar <mingo@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, Bard Liao <bardliao@...ltek.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	alsa-devel@...a-project.org,
	Anatol Pomozov <anatol.pomozov@...il.com>
Subject: Re: [RFC PATCH 1/2] regmap: add configurable lock class key for
 lockdep

On Mon, Jun 29, 2015 at 10:03:09PM +0800, Nicolas Boichat wrote:

> regmap instances are kalloc'ed, so they cannot contain the
> lock_class_key, which needs to be statically allocated (in .data).
> Another option would be to preallocate a bunch of lock_class_key in
> regmap.c, and pick from that, but that's terribly hacky...

Honestly this is all starting to sound like we're having to jump through
too many hoops for lockep (and other APIs are too from the sounds of it)
so we should be looking at lockdep here.

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