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Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Alexei Starovoitov , Shakeel Butt , Kefeng Wang , Joshua Hahn , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: change vma_alloc_folio_noprof() macro to inline function Date: Mon, 16 Feb 2026 11:58:47 -0500 X-Mailer: MailMate (2.0r6290) Message-ID: <15272AAE-6C14-4A80-AF70-4A46D1047B61@nvidia.com> In-Reply-To: <20260216121751.2378374-1-arnd@kernel.org> References: <20260216121751.2378374-1-arnd@kernel.org> Content-Type: text/plain Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BL1PR13CA0317.namprd13.prod.outlook.com (2603:10b6:208:2c1::22) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|CH3PR12MB8880:EE_ X-MS-Office365-Filtering-Correlation-Id: f3ae44f1-d130-4a74-8a07-08de6d7ca7d0 X-MS-Exchange-SenderADCheck: 1 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 6BatPaoU 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 16 Feb 2026, at 7:17, Arnd Bergmann wrote: > From: Arnd Bergmann > > In a few rare configurations with extra warnings eanbled, the new s/eanbled/enabled > drm_pagemap_migrate_populate_ram_pfn() calls vma_alloc_folio_noprof() > but that does not use all the arguments, leading to a harmless warning:= > > drivers/gpu/drm/drm_pagemap.c: In function 'drm_pagemap_migrate_populat= e_ram_pfn': > drivers/gpu/drm/drm_pagemap.c:701:63: error: parameter 'addr' set but n= ot used [-Werror=3Dunused-but-set-parameter=3D] > 701 | unsigned long a= ddr) > | ~~~~~~~~~~~~~~^= ~~~ > But addr is used at line 739 or line 741: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/= drivers/gpu/drm/drm_pagemap.c#n739 I wonder why compiler reported the error. > Replace the macro with an inline function so the compiler can see > how the argument would be used, but is still able to optimize out > the assignments. > > Signed-off-by: Arnd Bergmann > --- > include/linux/gfp.h | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > index 6ecf6dda93e0..23240208a91f 100644 > --- a/include/linux/gfp.h > +++ b/include/linux/gfp.h > @@ -335,8 +335,11 @@ static inline struct folio *folio_alloc_mpol_nopro= f(gfp_t gfp, unsigned int orde > { > return folio_alloc_noprof(gfp, order); > } > -#define vma_alloc_folio_noprof(gfp, order, vma, addr) \ > - folio_alloc_noprof(gfp, order) > +static inline struct folio *vma_alloc_folio_noprof(gfp_t gfp, int orde= r, > + struct vm_area_struct *vma, unsigned long addr) > +{ > + return folio_alloc_noprof(gfp, order); > +} > #endif > > #define alloc_pages(...) alloc_hooks(alloc_pages_noprof(__VA_ARGS__)= ) > -- = > 2.39.5 The changes look good to me. Acked-by: Zi Yan -- Best Regards, Yan, Zi