dma_alloc_from_pool
page = dma_alloc_from_pool(dev, PAGE_ALIGN(size), &cpu_addr,
struct page *dma_alloc_from_pool(struct device *dev, size_t size,
page = dma_alloc_from_pool(dev, size, &ret, gfp, dma_coherent_ok);
return dma_alloc_from_pool(dev, bytes, &vaddr, gfp,