From nobody Thu Sep 11 02:00:19 2025 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (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 5C2ED279792; Wed, 10 Sep 2025 17:29:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757525354; cv=pass; b=AJDfymteaxdK8KecixwmGmmmQgQ81P1rxbyDSoGIijT9arHRAoTpjngptT8QF90Kg3kCXsKpViiNoFQsGbDQ5rWY75ob/q44dRXCHd16+GPfFTR5Nr+f1tDn+Zb0TbZKG4qVMNw/qpr7JunrAa/gABo/ZgM84330oDdndYwtdgo= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757525354; c=relaxed/simple; bh=+sY7esOV4ftXk/7FoFtS2AcrS5EdQ0OEfrcxwpsWu0A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Wr1Qa8NFmNAcVSM1ydyniV8PC3tu4IsmkLMS+DLkoif8xqmrbKgUywWjW6D1+77AqZz6QBtCAQGqw8Lqc8VNkIOC9sMxinQTg1BfYp677OF4ElnaxBsOC4gn0M2Vb+M/eeA0HMjAe5QdC3TLklH1klXAVyVg6H35JNkSCSDbDDQ= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=daniel.almeida@collabora.com header.b=Y4gkSs61; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=daniel.almeida@collabora.com header.b="Y4gkSs61" ARC-Seal: i=1; a=rsa-sha256; t=1757525336; cv=none; d=zohomail.com; s=zohoarc; b=kjdNOp7l9h6y48lFjyoM0abO9ZJITEneqCk3f77o1YpPZYylfPEym1dEl9EGt3XigSUyAo8jml0Tb1idr5vVtQZ65VQwfa6XDURSCkN4ShwdyTYMLrQaAR3BwWWKkUglNG0QSzMWJaxymQxZPkEeBN7IdW9GEb/K+kydH1qRklc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1757525336; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=5RBAS6Ybhl3OEyHFveyxQEmvr4mrg6ZvjRKJIqMrvgg=; b=OeWwqAa8+8dT4EJ2DQHltISEKU8Jllz2CtX4hiwrdbsj9H4ry6aJdCLUnZ99GyfWR1aQf8wD0XtoHOQUYrs49qSwvFaQiXFZjhHlscy2DR56wRTGEIod0drJzX04k+FCNgzoZZCq9VpkPe3KEr54Tb96HC8yIL3/HmtUPB0Ey4o= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=daniel.almeida@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1757525336; s=zohomail; d=collabora.com; i=daniel.almeida@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:References:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=5RBAS6Ybhl3OEyHFveyxQEmvr4mrg6ZvjRKJIqMrvgg=; b=Y4gkSs61nnoWK3lu318TiRZ3CSjRi0kOJ0d6dPRKq9gDjQtMWw9cmxa+is7zXdSP l7ConYaMEFfWD2aw3AOLpWVQdRuXwBdJXLmee8snKvrQsdu892oHy9ujq/nRxqd5ih9 2fypgzI8WFwYxsrxjT4pHoV+zS+MAdZygYVoeQmI= Received: by mx.zohomail.com with SMTPS id 1757525335231838.1458446552067; Wed, 10 Sep 2025 10:28:55 -0700 (PDT) From: Daniel Almeida Date: Wed, 10 Sep 2025 14:28:27 -0300 Subject: [PATCH v2 1/2] rust: clk: implement Send and Sync 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: quoted-printable Message-Id: <20250910-clk-type-state-v2-1-1b97c11bb631@collabora.com> References: <20250910-clk-type-state-v2-0-1b97c11bb631@collabora.com> In-Reply-To: <20250910-clk-type-state-v2-0-1b97c11bb631@collabora.com> To: Michael Turquette , Stephen Boyd , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , "Rafael J. Wysocki" , Viresh Kumar Cc: linux-clk@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Daniel Almeida X-Mailer: b4 0.14.2 X-ZohoMailClient: External From: Alice Ryhl These traits are required for drivers to embed the Clk type in their own data structures because driver data structures are usually required to be Send. See e.g. [1] for the kind of workaround that drivers currently need due to lacking this annotation. Link: https://lore.kernel.org/rust-for-linux/20250812-tyr-v2-1-9e0f3dc9da95= @collabora.com/ [1] Signed-off-by: Daniel Almeida Signed-off-by: Alice Ryhl Reviewed-by: Danilo Krummrich Acked-by: Viresh Kumar Reviewed-by: Daniel Almeida Reviewed-by: Boqun Feng --- rust/kernel/clk.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/clk.rs b/rust/kernel/clk.rs index 1e6c8c42fb3a321951e275101848b35e1ae5c2a8..0a290202da69669d670ddad2b67= 62a1d5f1d912e 100644 --- a/rust/kernel/clk.rs +++ b/rust/kernel/clk.rs @@ -129,6 +129,13 @@ mod common_clk { #[repr(transparent)] pub struct Clk(*mut bindings::clk); =20 + // SAFETY: It is safe to call `clk_put` on another thread than where `= clk_get` was called. + unsafe impl Send for Clk {} + + // SAFETY: It is safe to call any combination of the `&self` methods i= n parallel, as the + // methods are synchronized internally. + unsafe impl Sync for Clk {} + impl Clk { /// Gets [`Clk`] corresponding to a [`Device`] and a connection id. /// --=20 2.51.0