vma->vm_page_prot =pgprot_writecombine(vma->vm_page_prot);elsevma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);if(dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))returnret;if(off < count && user_count <= (count - off)) { ret = remap_pfn_range(vma, vma...
它的alignof值是可通过编译开关-mno-align-double和-malign-double来控制的，其中-mno-align-double表示d...