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Thu, 08 Jan 2026 00:03:35 -0800 (PST) Received: from cryptic.lan ([2001:569:7e17:d700:9e5a:c54:de19:a242]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a3e3cb2fe3sm71065775ad.59.2026.01.08.00.03.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jan 2026 00:03:34 -0800 (PST) From: Allen Pais To: vkoul@kernel.org Cc: arnd@arndb.de, kees@kernel.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, Allen Pais Subject: [RFC PATCH 0/1] dmaengine: introduce dmaengine_bh_wq and bh helpers Date: Thu, 8 Jan 2026 00:03:30 -0800 Message-ID: <20260108080332.2341725-1-allen.lkml@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Vinod, This series contains a single patch that introduces a dedicated dmaengine bottom-half workqueue along with per-channel BH helpers. The change grew out of the earlier discussion about moving DMA tasklet usage over to a BH workqueue and I took some time to get the semantics right before sending this upstream: Earlier discussion: https://lore.kernel.org/all/2e9257af-c123-406b-a189-eaebeecc1d71@app.fastmail.com/ I’m intentionally sending only the foundational helper patch for review to avoid spamming the list. The full set of driver conversions is already available here: https://github.com/allenpais/dmaengine-bh-work Once the base helper patch is reviewed, I will follow up with the remaining driver conversions. This series is based on v6.19-rc4 (f10c325a345fef0a688a2bcdfab1540d1c924148). Thanks, Allen Allen Pais (1): dmaengine: introduce dmaengine_bh_wq and bh helpers drivers/dma/amd/qdma/qdma.c | 1 + drivers/dma/bcm2835-dma.c | 2 +- drivers/dma/dmaengine.c | 109 +++++++++++++++++- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 2 +- drivers/dma/dw-edma/dw-edma-core.c | 2 +- drivers/dma/hisi_dma.c | 2 +- drivers/dma/img-mdc-dma.c | 2 +- drivers/dma/imx-sdma.c | 2 +- drivers/dma/k3dma.c | 2 +- drivers/dma/loongson1-apb-dma.c | 2 +- drivers/dma/mediatek/mtk-cqdma.c | 2 +- drivers/dma/mediatek/mtk-hsdma.c | 2 +- drivers/dma/mediatek/mtk-uart-apdma.c | 4 +- drivers/dma/owl-dma.c | 2 +- drivers/dma/pxa_dma.c | 2 +- drivers/dma/qcom/bam_dma.c | 4 +- drivers/dma/qcom/qcom_adm.c | 2 +- drivers/dma/sa11x0-dma.c | 2 +- drivers/dma/sprd-dma.c | 2 +- drivers/dma/sun6i-dma.c | 2 +- drivers/dma/tegra186-gpc-dma.c | 2 +- drivers/dma/tegra210-adma.c | 2 +- drivers/dma/ti/k3-udma.c | 8 +- drivers/dma/ti/omap-dma.c | 2 +- drivers/dma/virt-dma.c | 6 +- drivers/dma/virt-dma.h | 8 +- include/linux/dmaengine.h | 50 ++++++++ 27 files changed, 189 insertions(+), 39 deletions(-) -- 2.43.0