linux-kernel - Re: linux-next: build warnings after merge of the mm tree

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Message-ID: <016b7cb8-451c-4d81-b3c2-e98fa0bc330a@redhat.com>
Date: Wed, 5 Mar 2025 10:53:37 +0100
From: David Hildenbrand <david@...hat.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>,
 Andrew Morton <akpm@...ux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warnings after merge of the mm tree

On 05.03.25 10:42, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the mm tree, today's linux-next build (htmldocs) produced
> these warnings:
> 
> include/linux/mm_types.h:482: warning: Function parameter or struct member '_usable_1' not described in 'folio'
> include/linux/mm_types.h:482: warning: Function parameter or struct member '_mapcount_1' not described in 'folio'
> include/linux/mm_types.h:482: warning: Function parameter or struct member '_refcount_1' not described in 'folio'
> 
> Introduced by commit
> 
>    bbde3b621cf7 ("mm: let _folio_nr_pages overlay memcg_data in first tail page")
> 
> from the mm-unstable branch of the mm tree.

Hm, we also don't document other dummy placeholders like:

* _flags_1
* _head_1
* __page_1

So I assume there must be one way to silence these warnings, let me dig ...

-- 
Cheers,

David / dhildenb