tiler_pin
int tiler_pin(struct tiler_block *block, struct page **pages,
ret = tiler_pin(omap_obj->block,
err = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true);
ret = tiler_pin(omap_obj->block, omap_obj->pages, npages,
ret = tiler_pin(block, omap_obj->pages, npages, omap_obj->roll, true);