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...
在这里记录一下我的理解，struct的对齐是遵照下列二个条件中最小的一个进行的： 1.#pragma pack(N)...