dma_pgprot
pgprot_t prot = dma_pgprot(dev, PAGE_KERNEL, attrs);
pgprot_t prot = dma_pgprot(dev, PAGE_KERNEL, attrs);
vma->vm_page_prot = dma_pgprot(dev, vma->vm_page_prot, attrs);
pgprot_t dma_pgprot(struct device *dev, pgprot_t prot, unsigned long attrs);
pgprot_t prot = dma_pgprot(dev, PAGE_KERNEL, attrs);
vma->vm_page_prot = dma_pgprot(dev, vma->vm_page_prot, attrs);
vma->vm_page_prot = dma_pgprot(dev, vma->vm_page_prot, attrs);