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charset="utf-8" Content-Transfer-Encoding: quoted-printable 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. Since the Clk type is thread-safe, implement the relevant traits. Reviewed-by: Daniel Almeida Reviewed-by: Danilo Krummrich Acked-by: Viresh Kumar Reviewed-by: Boqun Feng Signed-off-by: Alice Ryhl Reviewed-by: Gary Guo --- rust/kernel/clk.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/clk.rs b/rust/kernel/clk.rs index c1cfaeaa36a22be2e3180b1e9142bb608ab276ea..d192fbd97861212d738d24510ee= bcd99c9177f2c 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 2.52.0.351.gbe84eed79e-goog From nobody Sat Feb 7 21:11:53 2026 Received: from mail-ed1-f73.google.com (mail-ed1-f73.google.com [209.85.208.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0539F33F8DE for ; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Now that clk implements Send and Sync, we no longer need to manually implement these traits for TyrData. Thus remove the implementations. The comment also mentions the regulator. However, the regulator had the traits added in commit 9a200cbdb543 ("rust: regulator: implement Send and Sync for Regulator"), which is already in mainline. Reviewed-by: Danilo Krummrich Reviewed-by: Boqun Feng Signed-off-by: Alice Ryhl Reviewed-by: Daniel Almeida Reviewed-by: Gary Guo --- drivers/gpu/drm/tyr/driver.rs | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/drivers/gpu/drm/tyr/driver.rs b/drivers/gpu/drm/tyr/driver.rs index 0389c558c0367522471ea78fcf72a6b58c4a3650..09711fb7fe0b1c83b72bffba06f= 5a76c53244f4d 100644 --- a/drivers/gpu/drm/tyr/driver.rs +++ b/drivers/gpu/drm/tyr/driver.rs @@ -53,18 +53,6 @@ pub(crate) struct TyrData { pub(crate) gpu_info: GpuInfo, } =20 -// Both `Clk` and `Regulator` do not implement `Send` or `Sync`, but they -// should. 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Thu, 18 Dec 2025 05:27:53 -0800 (PST) Date: Thu, 18 Dec 2025 13:27:42 +0000 In-Reply-To: <20251218-clk-send-sync-v3-0-e48b2e2f1eac@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251218-clk-send-sync-v3-0-e48b2e2f1eac@google.com> X-Developer-Key: i=aliceryhl@google.com; a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1620; i=aliceryhl@google.com; h=from:subject:message-id; bh=hJ1r8AWFe6vjamRRbSdgVoDTTorMAE8/5j325qhqRPo=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBpRAFSiykIxnKvVV7ampJwe+hiZPH4dlKVVfNC2 bRMusCRGIiJAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCaUQBUgAKCRAEWL7uWMY5 Rs5ND/9lBcHvvP1F2jrlMF7zlcbzolVf/Ik/QcXkh9CEtamti0oWtsfXPKvcrmdowiTh3qqTeOG d1pcYkv8At0D62DBbQJID40ZEj2jC53yyQTl+JbIxQgkPKYKW/7tiZ/YZ5l4Be6z2ypAJGa6jlu 7P+IO8CGeyODkeDgL0U2tMGXuoKl6vJ9s93DzDVlYt3L2Dx6cpR55jWVWkBfziIoGS9Eei+zk7Z 4ylYtbeoBKVsKs4Ix3y89qYWygDe/wXz0aRIGoDHBiJpBl2ppjbCEhP0PWGQra7A3KUayfL2KYF zmZLGvVKljUBMKcuQTuQUJN31zFt6WU2+ASxRD7tU+8u2vwrGOoiHDCS5fwLhJ12/F3DBE2H4eL vVgQ+jd6O8L4xD7oC1Z77SciJgITmTJCFM/W1W4jBGkk9AFU6+XIyzMnWryfADATfwgdGytDQIu F8KCpPdYrWW3vo38v9f5rhole5bvAC9Eh3vo2PyGcGLpjIqimDbqTsLCSvJmm/yQa0TbMqIXp5a ya9OwwArkL66kUK/YcdhJDrrJZXsHnkTxjYNekN0UfUNnAkWUl7AO9hiAu/V0GLq7YAfVjeSoGl 4Gq54cB6CKjvPxv7GEqVbzEqyOnzjEJ8wCcU96VlVrvDrX57llCh1ppRHSozowXpxgScpJ/166f Mej0UG+6YnuMTlQ== X-Mailer: b4 0.14.2 Message-ID: <20251218-clk-send-sync-v3-3-e48b2e2f1eac@google.com> Subject: [PATCH v3 3/3] pwm: th1520: remove impl Send/Sync for Th1520PwmDriverData From: Alice Ryhl To: Michael Turquette , Stephen Boyd , Maarten Lankhorst , Maxime Ripard , Drew Fustini , Guo Ren , Fu Wei , "=?utf-8?q?Uwe_Kleine-K=C3=B6nig?=" , Michal Wilczynski Cc: Viresh Kumar , Miguel Ojeda , Boqun Feng , Gary Guo , "=?utf-8?q?Bj=C3=B6rn_Roy_Baron?=" , Benno Lossin , Andreas Hindborg , Trevor Gross , Danilo Krummrich , Daniel Almeida , linux-clk@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-riscv@lists.infradead.org, linux-pwm@vger.kernel.org, Alice Ryhl Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Now that clk implements Send and Sync, we no longer need to manually implement these traits for Th1520PwmDriverData. Thus remove the implementations. Signed-off-by: Alice Ryhl Reviewed-by: Daniel Almeida Reviewed-by: Gary Guo --- drivers/pwm/pwm_th1520.rs | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/drivers/pwm/pwm_th1520.rs b/drivers/pwm/pwm_th1520.rs index e3b7e77356fc2492077c519073e861beb3e44df9..043dc4dbc6232020195c7b73fad= 302bbb69652df 100644 --- a/drivers/pwm/pwm_th1520.rs +++ b/drivers/pwm/pwm_th1520.rs @@ -97,21 +97,6 @@ struct Th1520PwmDriverData { clk: Clk, } =20 -// This `unsafe` implementation is a temporary necessity because the under= lying `kernel::clk::Clk` -// type does not yet expose `Send` and `Sync` implementations. This block = should be removed -// as soon as the clock abstraction provides these guarantees directly. -// TODO: Remove those unsafe impl's when Clk will support them itself. - -// SAFETY: The `devres` framework requires the driver's private data to be= `Send` and `Sync`. -// We can guarantee this because the PWM core synchronizes all callbacks, = preventing concurrent -// access to the contained `iomem` and `clk` resources. -unsafe impl Send for Th1520PwmDriverData {} - -// SAFETY: The same reasoning applies as for `Send`. The PWM core's synchr= onization -// guarantees that it is safe for multiple threads to have shared access (= `&self`) -// to the driver data during callbacks. -unsafe impl Sync for Th1520PwmDriverData {} - impl pwm::PwmOps for Th1520PwmDriverData { type WfHw =3D Th1520WfHw; =20 --=20 2.52.0.351.gbe84eed79e-goog