From: Imre Deak <imre.deak@intel.com>
Date: Fri, 22 Mar 2013 21:10:44 +0000 (+0200)
Subject: drm/i915: set dummy page for stolen objects
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~55^2~60^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5bd4687e57bbacec20930f580d025aee9fa1f4d8;p=pandora-kernel.git

drm/i915: set dummy page for stolen objects

This is needed since currently sg_for_each_page assumes that we have
a valid page in each sg item. It is only a real problem for
CONFIG_SPARSEMEM where the page is dereferenced, in other cases the
iterator works ok with an invalid page pointer.

We can remove this workaround when we have fixed sg_page_iter to work on
scatterlists without backing pages.

Signed-off-by: Imre Deak <imre.deak@intel.com>
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