linux-kernel - Re: [RFC PATCH 01/26] hugetlb: make hstate accessor functions const

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Message-ID: <CAHS8izPrhw04QTEaPV-jje3Mm=Qktg96mJmpacoR62GzY9VZ7g@mail.gmail.com>
Date:   Fri, 24 Jun 2022 11:43:50 -0700
From:   Mina Almasry <almasrymina@...gle.com>
To:     James Houghton <jthoughton@...gle.com>
Cc:     Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <songmuchun@...edance.com>,
        Peter Xu <peterx@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Jue Wang <juew@...gle.com>,
        Manish Mishra <manish.mishra@...anix.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 01/26] hugetlb: make hstate accessor functions const

On Fri, Jun 24, 2022 at 10:37 AM James Houghton <jthoughton@...gle.com> wrote:
>
> This is just a const-correctness change so that the new hugetlb_pte
> changes can be const-correct too.
>
> Acked-by: David Rientjes <rientjes@...gle.com>
>

Reviewed-By: Mina Almasry <almasrymina@...gle.com>

> Signed-off-by: James Houghton <jthoughton@...gle.com>
> ---
>  include/linux/hugetlb.h | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index e4cff27d1198..498a4ae3d462 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -715,7 +715,7 @@ static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
>         return hstate_file(vma->vm_file);
>  }
>
> -static inline unsigned long huge_page_size(struct hstate *h)
> +static inline unsigned long huge_page_size(const struct hstate *h)
>  {
>         return (unsigned long)PAGE_SIZE << h->order;
>  }
> @@ -729,27 +729,27 @@ static inline unsigned long huge_page_mask(struct hstate *h)
>         return h->mask;
>  }
>
> -static inline unsigned int huge_page_order(struct hstate *h)
> +static inline unsigned int huge_page_order(const struct hstate *h)
>  {
>         return h->order;
>  }
>
> -static inline unsigned huge_page_shift(struct hstate *h)
> +static inline unsigned huge_page_shift(const struct hstate *h)
>  {
>         return h->order + PAGE_SHIFT;
>  }
>
> -static inline bool hstate_is_gigantic(struct hstate *h)
> +static inline bool hstate_is_gigantic(const struct hstate *h)
>  {
>         return huge_page_order(h) >= MAX_ORDER;
>  }
>
> -static inline unsigned int pages_per_huge_page(struct hstate *h)
> +static inline unsigned int pages_per_huge_page(const struct hstate *h)
>  {
>         return 1 << h->order;
>  }
>
> -static inline unsigned int blocks_per_huge_page(struct hstate *h)
> +static inline unsigned int blocks_per_huge_page(const struct hstate *h)
>  {
>         return huge_page_size(h) / 512;
>  }
> --
> 2.37.0.rc0.161.g10f37bed90-goog
>