Re: [PATCH 3/4] mm: abstract merge for new VMAs into vma_merge_new_vma()

[Lorenzo Stoakes]

On Mon, Oct 09, 2023 at 06:04:47PM +0200, Vlastimil Babka wrote:
> On 10/8/23 22:23, Lorenzo Stoakes wrote:
> > Only in mmap_region() and copy_vma() do we add VMAs which occupy entirely
> > new regions of virtual memory.
> >
> > We can share the logic between these invocations and make it absolutely
> > explici to reduce confusion around the rather inscrutible parameters
>
> explicit ... inscrutable
>

Ack will fix up in v2.

> > possessed by vma_merge().
> >
> > This also paves the way for a simplification of the core vma_merge()
> > implementation, as we seek to make the function entirely an implementation
> > detail.
> >
> > Note that on mmap_region(), vma fields are initialised to zero, so we can
> > simply reference these rather than explicitly specifying NULL.
>
> Right, if they were different from NULL, the code would be broken already.
>
> > Signed-off-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
>
> Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
>

Thanks!