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Mercier" Date: Wed, 25 Feb 2026 11:52:13 -0800 X-Gm-Features: AaiRm517LrodfDPDmk8aF233zMemSo71i-_zn9eOj5ImN-lsr29tVaebY-ntsoQ Message-ID: Subject: Re: [PATCH 4/7] mm: cma: Export dma_contiguous_default_area To: Maxime Ripard Cc: Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , =?UTF-8?Q?Christian_K=C3=B6nig?= , Marek Szyprowski , Robin Murphy , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Wed, Feb 25, 2026 at 8:42=E2=80=AFAM Maxime Ripard = wrote: > > The CMA dma-buf heap uses the dev_get_cma_area() inline function that > would either return the content of device.cma_area or the content of > dma_contiguous_default_area. > > The latter holds a pointer to the default CMA region, and is stored in a > public variable. However, that variable isn't exported which prevents to > use dev_get_cma_area() in modules. > > Since we want to turn the CMA heap into a module, let's export > dma_contiguous_default_area to allow modules to use dev_get_cma_area(). > > Signed-off-by: Maxime Ripard Reviewed-by: T.J. Mercier