From: David Woodhouse <David.Woodhouse@intel.com>
Date: Mon, 29 Jun 2009 10:17:38 +0000 (+0100)
Subject: intel-iommu: Introduce domain_sg_mapping() to speed up intel_map_sg()
X-Git-Tag: v2.6.31-rc2~12^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1605495c716ef4eebdb7606bcd1b593f28e2837;p=pandora-kernel.git

intel-iommu: Introduce domain_sg_mapping() to speed up intel_map_sg()

Instead of calling domain_pfn_mapping() repeatedly with single or
small numbers of pages, just pass the sglist in. It can optimise the
number of cache flushes like domain_pfn_mapping() does, and gives a huge
speedup for large scatterlists.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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