Re: [PATCH 21/30] mm/vma: add and use vma_[add/sub]_pgoff()

[Gregory Price]

On Mon, Jun 29, 2026 at 01:23:32PM +0100, Lorenzo Stoakes wrote:
> Add helpers for adding or subtracting to a VMA's page offset, exposed
> internally for VMA users within mm in mm/vma.h.
> 
> This is to lay the foundations for tracking anonymous page offset for
> MAP_PRIVATE file-backed mappings, where adding and subtracting from this
> value must be reflected in both the file and anonymous offsets.
> 
> These are used on VMA split and downward stack expansion.
> 
> No functional change intended.
> 
> Signed-off-by: Lorenzo Stoakes <ljs@xxxxxxxxxx>

Reviewed-by: Gregory Price <gourry@xxxxxxxxxx>