Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge()

[Zi Yan]

On Thu Sep 17, 2026 at 12:22 PM EDT, Lorenzo Stoakes (ARM) wrote:
> Replace the open-coded VMA_SPECIAL_FLAGS check in the VMA merge logic with
> two new functions vma_flags_can_merge() and vma_can_merge() and update the
> merge logic to use the former.
>
> This abstracts the check and expresses it in terms of the desired behaviour
> rather than an arbitrary and confusing VMA flag.
>
> This also lays the groundwork for making further improvements in VMA flag
> usage.
>
> Also update the userland VMA tests to reflect the change.
>
> No functional change intended.
>
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@xxxxxxxxxx>
> ---
>  include/linux/mm.h              | 21 +++++++++++++++++++++
>  mm/vma.c                        | 19 +++++++++++--------
>  tools/testing/vma/include/dup.h |  5 +++++
>  3 files changed, 37 insertions(+), 8 deletions(-)
>
LGTM.

Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>


-- 
Best Regards,
Yan, Zi