From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793840398; b=CLV1clSf0FRblweiJ2fZT/kh2TfJE/+kXUxoNmDViXm/OisYLHolFwc0XJy33FAb+RtJ vjnlnfmBoL6Uq9CY8dV9fKAG2UnmUrfEdoimNsI0mV0csrk2b5fvOJUT6Fth87/d/idSk O+0/tkqkHy0PmhZy725jV6T6XMoGpLLBfqGKQSFgIZrnAsuiMIzKVQKVpvRgz0b+mgjBY 3HtWETqZj7PabFUkM3XU69SfQl+dmS40PS0TKzYigsvZ2I6OSPB2mlCmg/hXLZPZRS+d7 w95I+WJUyG7KhFjw7YTx0RUAEGA+ttroV+o0Tn53u0xOD7+H8+FFM9X/u2oB/BUApdQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793840398; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Transfer-Encoding; bh=5ghn81JNo/X4bGl6s6oEWHPZ6Ik7xjUHUPnVmecnXK8=; b=WQeP7CXJGMXgT2EYvwYtyQYW+cz6L4a7rsq9CTfz/O9t1yBjD3BM6UJEcnCXZ0fo2IJ9 zwYSYUUn0LLn5EPvew2DJkYoxMgm55OSA4YxAGqoyy7XkhG3Aky2aTc73InObwDT+ncsg sQB5AIdDG+oZbONpiUvIzm4PSnZ6z2bBpuBVt9p1+Jd+MoPr3jp/qdQhOqGdi1NNsAxfd Z/CNKQYxcw8HABzGUrzjuQ3iXDP9QZiAFxt0Ft5ekUJTme+KZxHL3aI+p9Zid6PSmjB3J YCisneEj+rNZRYcByWMPk5ybeZ8Gv7cAJ2pP9jT8tMCReMXMh65VwqSXLYzA5vxxxdw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ihPLacdM; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DABA4606A31B; Thu, 5 Nov 2026 00:59:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ihPLacdM Received: by smtp.kernel.org (Postfix) with ESMTPSA id A97C81F000C1; Thu, 5 Nov 2026 00:59:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793840397; bh=5ghn81JNo/X4bGl6s6oEWHPZ6Ik7xjUHUPnVmecnXK8=; h=From:To:Cc:Subject:Date; b=ihPLacdMqCNrFzO8n7joRxaZ9vap3HjXn/9/X23dw73mWTRIO++0cGYGQlSJtbysZ gHaAGDNuzh4fmVsqzFzdbqfVCz3TuncksUYgCn7ThqS7yvfJWGqbJeQSF/ubrD9F1q +8TLVfQ32qBcIcUX6pzkyV8K+hXE0YBuLshQ40lsioUV8uauGIEuIdfKO3xPluuKf+ yzCvHBSm/764ORRpJWvefLVbmmMYw+SMZ8PfhuRR2qKwioJZKp8XkD1VV3sjcCJm0A i7YN4De/x3mhBEB8laYPLu2M8le27Svr2Ez7XuY7ZadYLnwoKLa0wCTSzFtMDn/YrN OZuvdHZXDOl/Q== From: Danilo Krummrich To: boqun@kernel.org, gary@garyguo.net, aliceryhl@google.com, lyude@redhat.com, daniel.almeida@collabora.com, work@onurozkan.dev, ojeda@kernel.org, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, tmgross@umich.edu, dakr@kernel.org, tamird@kernel.org, acourbot@nvidia.com, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz Cc: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v2 0/5] rust: sync: add WaitQueue infrastructure Date: Thu, 5 Nov 2026 01:59:37 +0100 Message-ID: <20261105005951.756157-1-dakr@kernel.org> X-Mailer: git-send-email 2.56.0 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 Content-Transfer-Encoding: 8bit Add a WaitQueue abstraction wrapping struct wait_queue_head, providing wait_event()-style methods that take a condition closure directly. This is needed for a (subsequent) DRM patch series to wait for in-flight file close operations during driver unbind. The Tyr driver also needs it for "CSF firmware responses and other GPU-driven events" [1]. Convert CondVar (and PollCondVar) to use WaitQueue internally, removing duplicate code using WaitQueue as the base primitive and add wait_interruptible_freezable_nonexclusive() for subsequent binder usage. Changes in v2: - Drop the already merged workqueue patch. - Make as_raw() public. - Split error types and use bindings constants for direct C calls. - Avoid condition rechecks after success. - Check the condition before preparing a waiter. - Add non-exclusive wait support, including a CondVar method for subsequent Binder conversion. - Handle zero and expired timeouts before interruption; extend KUnit coverage. [1] https://lore.kernel.org/dri-devel/20260721151423.444175-2-laura.nao@collabora.com/ Danilo Krummrich (5): rust: task: add safe schedule_timeout() wrapper rust: sync: add WaitQueue infrastructure rust: sync: convert CondVar and PollCondVar to use WaitQueue rust: sync: condvar: use task::schedule_timeout() rust: sync: condvar: add non-exclusive freezable waiting rust/kernel/sync.rs | 8 + rust/kernel/sync/condvar.rs | 134 ++++----- rust/kernel/sync/poll.rs | 19 +- rust/kernel/sync/wait.rs | 524 ++++++++++++++++++++++++++++++++++++ rust/kernel/task.rs | 16 ++ 5 files changed, 612 insertions(+), 89 deletions(-) create mode 100644 rust/kernel/sync/wait.rs base-commit: 41871f4ddf710339863f957bcfcab5094c234771 -- 2.56.0