linux-kernel - Re: [PATCH] mm: cma: Fix stub for cma_skip_dt_default_reserved

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Message-ID: <67426771-7df6-4544-a77c-97f44ee08d99@samsung.com>
Date: Mon, 9 Feb 2026 10:59:49 +0100
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: "David Hildenbrand (Arm)" <david@...nel.org>, Mark Brown
	<broonie@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Lorenzo
	Stoakes <lorenzo.stoakes@...cle.com>, "Liam R. Howlett"
	<Liam.Howlett@...cle.com>, Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport
	<rppt@...nel.org>, Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko
	<mhocko@...e.com>, "Rob Herring (Arm)" <robh@...nel.org>, Oreoluwa Babatunde
	<oreoluwa.babatunde@....qualcomm.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: cma: Fix stub for
 cma_skip_dt_default_reserved_mem()

On 09.02.2026 09:11, David Hildenbrand (Arm) wrote:
> On 1/28/26 17:28, Mark Brown wrote:
>> The stub for cma_skip_dt_default_reserved_mem() is not inlined so
>> triggers build warnings:
>>
>> In file included from /tmp/next/build/fs/proc/meminfo.c:18:
>> /tmp/next/build/include/linux/cma.h:68:13: warning: 
>> 'cma_skip_dt_default_reserved_mem' defined but not used 
>> [-Wunused-function]
>>     68 | static bool cma_skip_dt_default_reserved_mem(void)
>>        |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> which are fatal with -Werror.
>>
>> Fixes: 26332ae848f08 ("of: reserved_mem: Allow reserved_mem framework 
>> detect "cma=" kernel param")
>> Signed-off-by: Mark Brown <broonie@...nel.org>
>
> $ git show 26332ae848f08
> fatal: ambiguous argument '26332ae848f08': unknown revision or path 
> not in the working tree.
>
> This is not upstream or against an mm tree. Against which tree is it?

The fix for this issue has been squashed into commit 0fd17e598333 ("of: 
reserved_mem: Allow reserved_mem framework detect "cma=" kernel param") 
and merged to v6.19-rc8, so the above fix is not longer needed.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland