static void *dma_alloc_pages(struct device *dev, unsigned gfp, unsigned order)
static void *dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
static void *dma_alloc_pages(struct device *dev, unsigned gfp, unsigned order){	struct page *page;	int node;	if (dev->bus == &pci_bus_type)		node = pcibus_to_node(to_pci_dev(dev)->bus);	else		node = numa_node_id();	page = alloc_pages_node(node, gfp, order);	return page ? page_address(page) : NULL;}