Re: [PATCH 1/2] rust: mm: add VmaRef range query helpers

["Alexandre Courbot" <acourbot@nvidia.com>]

On Tue Aug 11, 2026 at 12:26 PM JST, liujinlong wrote:
> From: liujinlong <liujinlong@kylinos.cn>
>
> Add helpers on VmaRef to query the virtual address span and test
> address membership:
>
>   len(), is_empty()       - byte span and zero-length check
>   contains()              - single-address membership in
>                            [vm_start, vm_end)
>   contains_range()        - sub-range membership, returns false
>                            on overflow
>   is_page_aligned()       - PAGE_SIZE alignment for one address
>   is_page_aligned_range() - PAGE_SIZE alignment for addr and size
>
> is_page_aligned() and is_page_aligned_range() are associated
> functions rather than methods, since they do not reference any VMA
> state.  They live here instead of a separate utility module to
> keep the page-alignment helpers close to the range-checking code
> that often uses them.
>
> Signed-off-by: liujinlong <liujinlong@kylinos.cn>

I guess a more useful implementation would be to just return a `Range`
of `start..end` and benefit from all its methods, which cover most of
those defined in this patch.