Re: [RFC PATCH 1/3] mm: add function folio_in_range()

[Yu Zhao]

On Fri, Jul 7, 2023 at 10:52 AM Yin Fengwei <fengwei.yin@xxxxxxxxx> wrote:
>
> It will be used to check whether the folio is mapped to specific
> VMA and whether the mapping address of folio is in the range.
>
> Signed-off-by: Yin Fengwei <fengwei.yin@xxxxxxxxx>
> ---
>  mm/internal.h | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
>
> diff --git a/mm/internal.h b/mm/internal.h
> index f1276d90484ad..66117523d7d71 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -585,6 +585,32 @@ extern long faultin_vma_page_range(struct vm_area_struct *vma,
>                                    bool write, int *locked);
>  extern bool mlock_future_ok(struct mm_struct *mm, unsigned long flags,
>                                unsigned long bytes);
> +
> +static inline bool
> +folio_in_range(struct folio *folio, struct vm_area_struct *vma,
> +               unsigned long start, unsigned long end)

Is there a caller that's not "folio_in_range(folio, vma,
vma->vm_start, vma->vm_end)"?

If not, then just "folio_within_vma(folio, vma)" or a wrapper on top
of  folio_in_range().