From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 6 Aug 2013 08:59:46 +0000 (+0100)
Subject: drm: Apply kref_put_mutex() optimisations to drm_gem_object_unreference_unlocked()
X-Git-Tag: v3.12-rc1~136^2~138
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7fc65eb731cda8304865669166fb9a4c519bee69;p=pandora-kernel.git

drm: Apply kref_put_mutex() optimisations to drm_gem_object_unreference_unlocked()

We can apply the same optimisation tricks as kref_put_mutex() in our
local equivalent function. However, we have a different locking semantic
(we unlock ourselves, in kref_put_mutex() the callee unlocks) so that we
can use the same callbacks for both locked and unlocked kref_put()s and
so can not simply convert to using kref_put_mutex() directly.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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