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Mercier" , =?UTF-8?Q?Christian_K=C3=B6nig?= , Robin Murphy , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Albert Esteve , 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-Language: en-US From: Marek Szyprowski In-Reply-To: <20260320-cryptic-industrious-otter-5b696a@houat> Content-Transfer-Encoding: 8bit X-CMS-MailID: 20260327083354eucas1p2e649b550ecb5424fabb9ad899e26277a X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20260303101320eucas1p2eb4fea499364ef20825d0d73585a2555 X-EPHeader: CA X-CMS-RootMailID: 20260303101320eucas1p2eb4fea499364ef20825d0d73585a2555 References: <20260303-dma-buf-heaps-as-modules-v3-0-24344812c707@kernel.org> <20260320-cryptic-industrious-otter-5b696a@houat> X-Rspamd-Queue-Id: 1EE4420009 X-Stat-Signature: qmmbrre1z6p5964o4i3u3kxtw1fgq4nj X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1774600436-266288 X-HE-Meta: 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 bh40Es1i MfuOhaiHptKIn80ZZoEz33d+cToO6CKMmgnYBltt0MVSsUVYG/j46a9pY+10sob5r1LyX8Hwc2X2RJGId613jLfLpG1fIea3/X2DJbdqXkw+/nGsKyKNqzETW/l2DvKzHF2QY Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 20.03.2026 14:09, Maxime Ripard wrote: > On Fri, Mar 20, 2026 at 01:24:18PM +0100, Marek Szyprowski wrote: >> On 03.03.2026 11:13, Maxime Ripard wrote: >>> The recent introduction of heaps in the optee driver [1] made possible >>> the creation of heaps as modules. >>> >>> It's generally a good idea if possible, including for the already >>> existing system and CMA heaps. >>> >>> The system one is pretty trivial, the CMA one is a bit more involved, >>> especially since we have a call from kernel/dma/contiguous.c to the CMA >>> heap code. This was solved by turning the logic around and making the >>> CMA heap call into the contiguous DMA code. >>> >>> Let me know what you think, >>> Maxime >>> >>> 1: https://lore.kernel.org/dri-devel/20250911135007.1275833-4-jens.wiklander@linaro.org/ >>> >>> Signed-off-by: Maxime Ripard >> I'm okay with the kernel/dma/contiguous.c changes. I only wonder how to >> properly merge them. There are other pending changes to >> kernel/dma/contiguous.c file [1] and if they finally get reviewed, I >> would like to merge both via dma-mapping-for-next tree. Then I can >> provide a stable branch for merging the remaining dma-buf pathes. Is it >> okay for You? > That sounds reasonable to me I've applied patches 1-5 to my dma-mapping-for-next branch and resolved conflicts in the mentioned kernel/dma/contiguous.c file. Here is a stable branch to apply remaining dma-buf heaps patches: https://web.git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux.git/log/?h=dma-contig-for-7.1-modules-prep Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland