From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 4 Apr 2011 12:29:58 +0000 (+0200)
Subject: ARM: mxc: Add missing lockdep annotation
X-Git-Tag: v2.6.39-rc6~9^2~7^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5eee2fdefc89df312034e5e0e6f5dd55c4e9bae;p=pandora-kernel.git

ARM: mxc: Add missing lockdep annotation

The irq_set_wake() function of the gpio irq_chip calls
enable/disable_irq_wake() on the demultiplex interrupt. That leads to
a lockdep warning "INFO: possible recursive locking detected" because
irq_set_type() is called under irq_desc->lock and the *_irq_wake()
calls take irq_desc->lock of the demux interrupt.

Tell lockdep that the gpio irqs are in a different lock class.

Documentation/SubmitChecklist:
 15: All codepaths have been exercised with all lockdep features enabled.

That's a non-optional requirement, AFAICT.

Reported-and-tested-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LAKML-Reference: alpine.LFD.2.00.1104041416290.19945@localhost6.localdomain6
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---

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