From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAD0E3A872B; Tue, 7 Apr 2026 10:38:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775558282; cv=none; b=CROc+DVyI5yFyPM5oeZ/R3SHKcQznokN1E4hnoaNrD9YLWWlG8I+AgBmH8cY2Flooxf2qP/bj9/cQsoxIvBksgjXn+XjGEVJdHDtLg6PgwR6nZ/9Mn1G48Tx4k1fXRGwf4PjMF+beJN6l1ROAnD1b9rIgBSe5SULvILPFJEFnig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775558282; c=relaxed/simple; bh=LQuTGRFuMGDvZhUjpEenEBzJ7iSFUxEEIm0vvNjcSrc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PvLQEkpYzecDrBN9JsQLucZI25MjHY57L7E4sYu2cPLYhHeGBJT1vVK8BueFScHQCDSaQNJVBUGsqUsYT4AuLTPrTUpNW9iowEw2Wzg9LvlxYyYwNk+pDEjb9lc8+raG9HTP9ifC8sWN2dBysElq986EcK1bLFUHLK4uoqtGI+M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mo27DZ7L; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mo27DZ7L" Received: by smtp.kernel.org (Postfix) with ESMTPS id 57AEAC2BCAF; Tue, 7 Apr 2026 10:38:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775558282; bh=LQuTGRFuMGDvZhUjpEenEBzJ7iSFUxEEIm0vvNjcSrc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=mo27DZ7LUJRy3kchDB12+n0zxwumSJYOrIQQ7Crfxc9X8+K1fL5egG+Sq++tHUSa2 6U5E/aMnS+OxW3QnbSWtyRrgDfggm/mEHuNTOMAChZsqguV0Wj3ES7GsaUhivmpSag 39rDkjvXSpa1UEsuByZIB/Pguats6eQTjwsr7yEBNzBVgAoccSiWLdzH2+9/7z+6fa CXhWuQmQXN88jkcFYuHzIli39vPfHNk9wG5db0L9KO7pWHTr1JDLmgFTfgOtNlDhva +YSdMt2nmXXLQs+Eo/yGPh/UbJ2v/0SXvpvf2bF6i/9CImcR4yQo2SXG6GnY3YG7H5 8oZhUTrTQZ2Mw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 460F8EDB7F2; Tue, 7 Apr 2026 10:38:02 +0000 (UTC) From: Aakash Bollineni via B4 Relay Date: Tue, 07 Apr 2026 16:07:50 +0530 Subject: [PATCH v4 1/3] rust: helpers: add workqueue helpers Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260407-workqueue-v3-final-v4-1-c27da7e5f175@multicorewareinc.com> References: <20260407-workqueue-v3-final-v4-0-c27da7e5f175@multicorewareinc.com> In-Reply-To: <20260407-workqueue-v3-final-v4-0-c27da7e5f175@multicorewareinc.com> To: Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Alice Ryhl , Tejun Heo , Lai Jiangshan , Boqun Feng , Benno Lossin , Andreas Hindborg Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Aakash Bollineni X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775558278; l=2221; i=aakash.bollineni@multicorewareinc.com; s=20260402; h=from:subject:message-id; bh=TWgLPab5a3CzaBmRxYd/7ukOEqxyGwyfOaFPDSJ64gE=; b=zo4gPOq4vS0XvmtPiBtrRr47cvqZfr/jy8n+BMKHrWdz7Vd3vGX4+IrFVc6Z0G6cF/U8PY1kw R5HSl2Z/VZKA7g19CIzCKRo8yIV/ChITjZkZyPY7yah9WRP2M72rWHX X-Developer-Key: i=aakash.bollineni@multicorewareinc.com; a=ed25519; pk=r3Gonl+2k+8RozN9U/XwfICQdnRlAcLeeAfsExmurdE= X-Endpoint-Received: by B4 Relay for aakash.bollineni@multicorewareinc.com/20260402 with auth_id=711 X-Original-From: Aakash Bollineni Reply-To: aakash.bollineni@multicorewareinc.com From: Aakash Bollineni Add C-helpers to bridge the Rust workqueue abstraction with the kernel's C workqueue macros. These helpers wrap core workqueue functions that are either inline or macros in C, making them accessible to Rust FFI. New wrappers: - rust_helper_work_pending(): Wraps work_pending(). - rust_helper_cancel_work_sync(): Wraps cancel_work_sync(). - rust_helper_cancel_delayed_work_sync(): Wraps cancel_delayed_work_sync(). - rust_helper_init_delayed_work(): Performs robust initialization of a delayed_work structure, ensuring the correct timer function (delayed_work_timer_fn) and lockdep maps are initialized using standard kernel macros. These helpers are essential for supporting safe cancellation and correct DelayedWork lifecycle management in the Rust workqueue API. Signed-off-by: Aakash Bollineni --- rust/helpers/workqueue.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/rust/helpers/workqueue.c b/rust/helpers/workqueue.c index ce1c3a5b2150..85a6c0b9e4d5 100644 --- a/rust/helpers/workqueue.c +++ b/rust/helpers/workqueue.c @@ -14,3 +14,35 @@ __rust_helper void rust_helper_init_work_with_key(struct work_struct *work, INIT_LIST_HEAD(&work->entry); work->func = func; } + +__rust_helper bool rust_helper_work_pending(struct work_struct *work) +{ + return work_pending(work); +} + +__rust_helper bool rust_helper_cancel_work_sync(struct work_struct *work) +{ + return cancel_work_sync(work); +} + +__rust_helper bool rust_helper_cancel_delayed_work_sync(struct delayed_work *dwork) +{ + return cancel_delayed_work_sync(dwork); +} + +__rust_helper void rust_helper_init_delayed_work(struct delayed_work *dwork, + work_func_t func, + const char *name, + struct lock_class_key *key, + const char *tname, + struct lock_class_key *tkey) +{ + INIT_DELAYED_WORK(dwork, func); + lockdep_init_map(&dwork->work.lockdep_map, name, key, 0); + timer_init_key(&dwork->timer, dwork->timer.function, TIMER_IRQSAFE, tname, tkey); +} + +__rust_helper void *rust_helper_get_dwork_timer_fn(void) +{ + return (void *)delayed_work_timer_fn; +} -- 2.43.0