From 4c914c0c7c787b8f730128a8cdcca9c50b0784ab Mon Sep 17 00:00:00 2001
From: Brad Volkin <bradley.d.volkin@intel.com>
Date: Tue, 18 Feb 2014 10:15:45 -0800
Subject: [PATCH] drm/i915: Refactor shmem pread setup

The command parser is going to need the same synchronization and
setup logic, so factor it out for reuse.

v2: Add a check that the object is backed by shmem

Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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