linux-kernel - Re: Locking in the clk API

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Message-ID: <20110120185617.GI6335@n2100.arm.linux.org.uk>
Date:	Thu, 20 Jan 2011 18:56:17 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Ben Dooks <ben-linux@...ff.org>
Cc:	Paul Mundt <lethal@...ux-sh.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-sh@...r.kernel.org,
	Ben Herrenschmidt <benh@...nel.crashing.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org,
	Uwe Kleine-K??nig <u.kleine-koenig@...gutronix.de>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: Locking in the clk API

On Thu, Jan 20, 2011 at 04:29:15PM +0000, Ben Dooks wrote:
> I really don't like the fact that people are doing these things in
> atomic contexts, and I think we should apply some pressure to move
> the atomic caller cases to use systems where they can sleep such as
> using threaded-irq handlers (they work very nicely)

How do you ensure that printk is always called from a non-atomic
context?
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