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Setting single memory pages at a time to wc takes a lot time in cache flush. To reduce number of cache flush set_pages_array_wc and set_memory_array_wc can be used to set multiple pages to WC with single cache flush. This improves allocation performance for wc cached pages in drm/ttm. CC: Suresh Siddha <suresh.b.siddha@intel.com> CC: Venkatesh Pallipadi <venkatesh.pallipadi@gmail.com> Signed-off-by: Pauli Nieminen <suokkos@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>