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We depend on intel_iommu_gfx_mapped for various workarounds, but that is only available under an #ifdef CONFIG_INTEL_IOMMU. Refactor all the cut-and-paste ifdefs to a common routine. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/20170525121612.2190-1-chris@chris-wilson.co.uk Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>