linux-kernel - Re: [PATCH 1/3] mm/rmap: rename page__anon_vma to page_anon

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Message-ID: <ffb0d633-84c4-4c02-a4b2-021ff8c9b6da@lucifer.local>
Date: Fri, 18 Apr 2025 10:14:25 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Ye Liu <ye.liu@...ux.dev>
Cc: akpm@...ux-foundation.org, linmiaohe@...wei.com, nao.horiguchi@...il.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Ye Liu <liuye@...inos.cn>, David Hildenbrand <david@...hat.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Harry Yoo <harry.yoo@...cle.com>,
        Rik van Riel <riel@...riel.com>
Subject: Re: [PATCH 1/3] mm/rmap: rename page__anon_vma to page_anon_vma for
 consistency

On Fri, Apr 18, 2025 at 03:52:24PM +0800, Ye Liu wrote:
> From: Ye Liu <liuye@...inos.cn>
>
> Renamed local variable page__anon_vma in page_address_in_vma() to
> page_anon_vma. The previous naming convention of using double underscores
> (__) is unnecessary and inconsistent with typical kernel style, which uses
> single underscores to denote local variables. Also updated comments to
> reflect the new variable name.
>
> Functionality unchanged.
>
> Signed-off-by: Ye Liu <liuye@...inos.cn>

Thanks, this looks good. I don't know why we named it this way :)

Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

> ---
>  mm/rmap.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/mm/rmap.c b/mm/rmap.c
> index 67bb273dfb80..b509c226e50d 100644
> --- a/mm/rmap.c
> +++ b/mm/rmap.c
> @@ -789,13 +789,13 @@ unsigned long page_address_in_vma(const struct folio *folio,
>  		const struct page *page, const struct vm_area_struct *vma)
>  {
>  	if (folio_test_anon(folio)) {
> -		struct anon_vma *page__anon_vma = folio_anon_vma(folio);
> +		struct anon_vma *page_anon_vma = folio_anon_vma(folio);
>  		/*
>  		 * Note: swapoff's unuse_vma() is more efficient with this
>  		 * check, and needs it to match anon_vma when KSM is active.
>  		 */
> -		if (!vma->anon_vma || !page__anon_vma ||
> -		    vma->anon_vma->root != page__anon_vma->root)
> +		if (!vma->anon_vma || !page_anon_vma ||
> +		    vma->anon_vma->root != page_anon_vma->root)
>  			return -EFAULT;
>  	} else if (!vma->vm_file) {
>  		return -EFAULT;
> @@ -803,7 +803,7 @@ unsigned long page_address_in_vma(const struct folio *folio,
>  		return -EFAULT;
>  	}
>
> -	/* KSM folios don't reach here because of the !page__anon_vma check */
> +	/* KSM folios don't reach here because of the !page_anon_vma check */
>  	return vma_address(vma, page_pgoff(folio, page), 1);
>  }
>
> --
> 2.25.1
>