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Message-ID: <19908a46-feaf-4bbb-b41c-ef5b7d72343a@redhat.com>
Date: Wed, 30 Apr 2025 23:11:03 +0200
From: David Hildenbrand <david@...hat.com>
To: Kairui Song <kasong@...cent.com>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Matthew Wilcox <willy@...radead.org>, Hugh Dickins <hughd@...gle.com>,
 Chris Li <chrisl@...nel.org>, Yosry Ahmed <yosryahmed@...gle.com>,
 "Huang, Ying" <ying.huang@...ux.alibaba.com>, Nhat Pham <nphamcs@...il.com>,
 Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/6] mm: move folio_index to mm/swap.h and remove no
 longer needed helper

On 30.04.25 20:10, Kairui Song wrote:
> From: Kairui Song <kasong@...cent.com>
> 
> There are no remaining users of folio_index() outside the mm subsystem.
> Move it to mm/swap.h to co-locate it with swap_cache_index(), eliminating
> a forward declaration, and a function call overhead.
> 
> Also remove the helper that was used to fix circular header dependency
> issue.
> 
> Signed-off-by: Kairui Song <kasong@...cent.com>
> ---
>   include/linux/pagemap.h | 20 --------------------
>   mm/gup.c                |  1 +
>   mm/memfd.c              |  1 +
>   mm/migrate.c            |  1 +
>   mm/page-writeback.c     |  1 +
>   mm/swap.h               | 18 ++++++++++++++++++
>   mm/swapfile.c           |  6 ------
>   7 files changed, 22 insertions(+), 26 deletions(-)

[...]

>   bool isolate_movable_page(struct page *page, isolate_mode_t mode)
>   {
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index 20e1d76f1eba..9ff44b64d3d6 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -41,6 +41,7 @@
>   #include <trace/events/writeback.h>
>   
>   #include "internal.h"
> +#include "swap.h"

I wonder if we should just have it in mm/internal.h instead?

In any case

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

-- 
Cheers,

David / dhildenb


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