From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 13 Dec 2010 16:54:50 +0000 (+0000)
Subject: drm/i915/ringbuffer: Make IRQ refcnting atomic
X-Git-Tag: v2.6.38-rc1~419^2~23^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b13c2b96bf15b9dd0f1a45fd788f3a3025c5aec6;p=pandora-kernel.git

drm/i915/ringbuffer: Make IRQ refcnting atomic

In order to enforce the correct memory barriers for irq get/put, we need
to perform the actual counting using atomic operations.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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