Re: [PATCH 3/3] mm/mmap.c: extract __vma_unlink_list as counter part for __vma_link_list

[Vlastimil Babka]

On 8/14/19 8:57 AM, Wei Yang wrote:
> On Tue, Aug 13, 2019 at 10:16:11PM -0700, Christoph Hellwig wrote:
>>Btw, is there any good reason we don't use a list_head for vma linkage?
> 
> Not sure, maybe there is some historical reason?

Seems it was single-linked until 2010 commit 297c5eee3724 ("mm: make the vma
list be doubly linked") and I guess it was just simpler to add the vm_prev link.

Conversion to list_head might be an interesting project for some "advanced
beginner" in the kernel :)