linux-kernel - Re: [PATCH 04/13] mm/memory-failure: save a page

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Date: Fri, 24 May 2024 17:06:11 +0200
From: David Hildenbrand <david@...hat.com>
To: Miaohe Lin <linmiaohe@...wei.com>, akpm@...ux-foundation.org,
 tony.luck@...el.com, bp@...en8.de
Cc: nao.horiguchi@...il.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org
Subject: Re: [PATCH 04/13] mm/memory-failure: save a page_folio() call

On 24.05.24 11:13, Miaohe Lin wrote:
> Use local variable folio directly to save a page_folio() call.
> No functional change intended.
> 
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
> ---
>   mm/memory-failure.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index b571aaf987a2..73878ecdec22 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -1658,7 +1658,7 @@ static bool hwpoison_user_mappings(struct folio *folio, struct page *p,
>   	unmap_success = !page_mapped(p);

We should be using folio_mapped() here.

>   	if (!unmap_success)
>   		pr_err("%#lx: failed to unmap page (folio mapcount=%d)\n",
> -		       pfn, folio_mapcount(page_folio(p)));
> +		       pfn, folio_mapcount(folio));

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb