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Wed, 11 Nov 2026 09:53:38 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1794387219; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VRiZhzrsDkrLspAml0XRBl5rak3lI4bTzhSsupMJ/y8=; b=td12n49UKDo56vCxSTn09U/FbdYGCk/hjrgkPwsYYmfR0Gs5QBppPCBDtVxxLchIEUwdQb qOgaQ7bu4TKe2ydp1VVhzS3MjouOIvhK3svhqAqL4/zeXX6snq3K7vPx9e14jLpaWSPfrN CC8kqaWegcbNN3dhGKGxAUSh8tFn4cT6u0zUeVOhFHv7yRgcI2X3Hx2TJKeot6Qlqt1EwC lXHAwJBaYus+xC2WzZaQgsfOSySsNxfufDkkyksnvgI5eJB6EDfy5i8Q8e6p4IJt1EIvEW KDNGmFpUTrOi351V8lzioglBOuHpSOovM/WIAIwzWjYiS+xktKSPpS25dn1MEg== Message-ID: Subject: Re: [PATCH 0/3] dma-buf: dma-fence: Remove dma_fence_init64() From: Philipp Stanner Reply-To: phasta@kernel.org To: Philipp Stanner , Min Ma , Lizhi Hou , Oded Gabbay , "Rob Herring (Arm)" , Tomeu Vizoso , Karol Wachowski , Andrzej Kacprowski , Heiko Stuebner , Sumit Semwal , Christian =?ISO-8859-1?Q?K=F6nig?= , Felix Kuehling , Alex Deucher , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Lucas Stach , Russell King , Christian Gmeiner , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Alessio Belle , Luigi Santivetti , Qiang Yu , Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , Lyude Paul , Danilo Krummrich , Boris Brezillon , Steven Price , =?ISO-8859-1?Q?Adri=E1n?= Larumbe , Liviu Dudau , Dave Airlie , Gerd Hoffmann , Matthew Brost , Natalie Vock , Arun Pravin , Matthew Auld , Thomas =?ISO-8859-1?Q?Hellstr=F6m?= , Melissa Wen , =?ISO-8859-1?Q?Ma=EDra?= Canal , Dave Stevenson , Raspberry Pi Kernel Maintenance , Dmitry Osipenko , Gurchetan Singh , Chia-I Wu , Zack Rusin , Broadcom internal kernel review list , Thierry Reding , Mikko Perttunen , Jonathan Cameron , David Lechner , Nuno =?ISO-8859-1?Q?S=E1?= , Andy Shevchenko , Neill Kapron , Greg Kroah-Hartman , Alice Ryhl , Miguel Ojeda , Boqun Feng , Gary Guo , =?ISO-8859-1?Q?Bj=F6rn?= Roy Baron , Benno Lossin , Andreas Hindborg , Trevor Gross , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , Onur =?ISO-8859-1?Q?=D6zkan?= , Sunil Khatri , Prike Liang , Vitaly Prosyak , Jesse Zhang , Timur =?ISO-8859-1?Q?Krist=F3f?= , Srinivasan Shanmugam , David Rosca , Marco Crivellari , Krzysztof Karas , Andi Shyti , Janusz Krzysztofik , Shixiong Ou , Jouni =?ISO-8859-1?Q?H=F6gander?= , Joel Fernandes , Thadeu Lima de Souza Cascardo , Pierre-Eric Pelloux-Prayer , Al Viro , Michael Bommarito , Sam Day , Gabriel Prostitis Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, amd-gfx@lists.freedesktop.org, etnaviv@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, imagination@lists.freedesktop.org, lima@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-iio@vger.kernel.org, linux-usb@vger.kernel.org Date: Wed, 11 Nov 2026 09:53:25 +0100 In-Reply-To: <20261105113529.1989375-2-phasta@kernel.org> References: <20261105113529.1989375-2-phasta@kernel.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.60.2 (3.60.2-3.fc44) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-MBO-RS-ID: 63c1ec95d89f50e0830 X-MBO-RS-META: pdph9mgme6uj6kihqyt55uq9zqcpmeni On Thu, 2026-11-05 at 12:35 +0100, Philipp Stanner wrote: > We recently had a discussion about reworking dma_fence init to close a > race-window [1]. >=20 > The community agreement seems to have been that we can get rid of > dma_fence_init64(), so let's do that already. In the meantime we can > continue our discussions regarding the race in [1]. >=20 > This also touches the Rust dma_fence, which actually should use 64-bit > seqnos (was forgotten so far). Rust fence has no users currently, so > needs no backporting, so I would like to address that in a distinct > patch. >=20 > Tested on Nouveau with and without the SEQNO64 flag. Nouveau also uses > the USER flag, so I hope we're fine. >=20 >=20 > P. >=20 > [1] https://lore.kernel.org/dri-devel/20261029095542.1526750-3-phasta@ker= nel.org/ >=20 >=20 > Philipp Stanner (3): > =C2=A0 dma-buf: dma-fence: Add flags parameter to dma_fence_init() > =C2=A0 dma-buf: Port users of dma_fence_init64() > =C2=A0 dma-buf: dma-fence: Remove dma_fence_init64() @Christian, what do you think, shall we go on with this one? P.