linux-kernel - Re: [PATCH linux-next] mm/hugetlb: replace get_hwpoison_huge_page() with get_hwpoison_hugetlb_folio() when !CONFIG

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Message-ID: <a700c648-f1de-83af-ae6a-181bf8f04e21@oracle.com>
Date:   Thu, 19 Jan 2023 21:56:53 -0800
From:   Sidhartha Kumar <sidhartha.kumar@...cle.com>
To:     yang.yang29@....com.cn, mike.kravetz@...cle.com,
        muchun.song@...ux.dev
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org
Subject: Re: [PATCH linux-next] mm/hugetlb: replace get_hwpoison_huge_page() with get_hwpoison_hugetlb_folio() when !CONFIG_HUGETLBFS

On 1/19/23 6:36 PM, yang.yang29@....com.cn wrote:
> From: Yang Yang <yang.yang29@....com.cn>
> 
> When CONFIG_HUGETLBFS is not set, there are two problems. One
> is implicit declaration of function get_hwpoison_hugetlb_folio(),
> the other is get_hwpoison_huge_page() is defined but not used.
> Fix them all by defining get_hwpoison_hugetlb_folio() instead of
> get_hwpoison_huge_page() when !CONFIG_HUGETLB_PAGE.
> 
> Fixes: 92e109a2c5a7 ("mm/hugetlb: convert get_hwpoison_huge_page() to folios")
> Signed-off-by: Yang Yang <yang.yang29@....com.cn>
> ---
>   include/linux/hugetlb.h | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index f14a6bd2a6ed..9189cc359c64 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -417,7 +417,8 @@ static inline int isolate_hugetlb(struct folio *folio, struct list_head *list)
>   	return -EBUSY;
>   }
> 
> -static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb, bool unpoison)
> +static inline int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb,
> +			bool unpoison)
>   {
>   	return 0;
>   }

I believe this issue has been fixed by this patch:

https://lore.kernel.org/linux-mm/20230119111920.635260-1-arnd@kernel.org/T/

which has been added to mm-unstable now.

Thanks,
Sidhartha Kumar