linux-kernel - Re: [PATCHv4 04/14] mm: Move set/clear_compound_head() next to compound

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Message-ID: <F8A12704-8573-4F9D-90A6-0D54B3EBEFDD@nvidia.com>
Date: Wed, 21 Jan 2026 11:35:37 -0500
From: Zi Yan <ziy@...dia.com>
To: Kiryl Shutsemau <kas@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Muchun Song <muchun.song@...ux.dev>, David Hildenbrand <david@...nel.org>,
 Matthew Wilcox <willy@...radead.org>, Usama Arif <usamaarif642@...il.com>,
 Frank van der Linden <fvdl@...gle.com>, Oscar Salvador <osalvador@...e.de>,
 Mike Rapoport <rppt@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Baoquan He <bhe@...hat.com>,
 Michal Hocko <mhocko@...e.com>, Johannes Weiner <hannes@...xchg.org>,
 Jonathan Corbet <corbet@....net>, kernel-team@...a.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCHv4 04/14] mm: Move set/clear_compound_head() next to
 compound_head()

On 21 Jan 2026, at 11:22, Kiryl Shutsemau wrote:

> Move set_compound_head() and clear_compound_head() to be adjacent to the
> compound_head() function in page-flags.h.
>
> These functions encode and decode the same compound_info field, so
> keeping them together makes it easier to verify their logic is
> consistent, especially when the encoding changes.
>
> Signed-off-by: Kiryl Shutsemau <kas@...nel.org>
> Reviewed-by: Muchun Song <muchun.song@...ux.dev>
> ---
>  include/linux/page-flags.h | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>
Make sense.

Reviewed-by: Zi Yan <ziy@...dia.com>

Best Regards,
Yan, Zi