dma_alloc_pages
page = dma_alloc_pages(&teedev->dev, page_count * PAGE_SIZE,
struct page *dma_alloc_pages(struct device *dev, size_t size,
struct page *page = dma_alloc_pages(dev, size, dma_handle, dir, gfp);
DEFINE_ALLOC_EVENT(dma_alloc_pages);
EXPORT_SYMBOL_GPL(dma_alloc_pages);