From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 5CB17367288; Thu, 25 Jun 2026 10:17:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782382632; cv=none; b=c+lvkJkRs4KrQKdvjBxdu4R8B6e0OfDwFfmoRk3LT021pB5kvrGFLU7SoUipOsf5T0Y2c9d6eywqfmPVSRHDQ/ZLQPZpq7V+W6lLRB2yjlOPeYUq2zOq2Yuqn47X+kN1uq5+BHTdkz1oMWGNFIVfRSNB3Y37lOasbIXLtz5knuc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782382632; c=relaxed/simple; bh=L57zDm7ALp0lZWMW+Cln/Gg2DuJozYQVYKA2SZ2s83c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Z6vRl85SitotsIj3bHCTChjRcjlAlFL5NvJ0kfwmQdLRBlft9rxR+jJ5na301B1ji3YBCYVUdRjDJs92Fq1Fi3vxh2Ftt3sScvy7NIQsIq9FmxLk4sELIl5aYwNuquskULg7EOPwTVBpQUmQ7TTwizCXVvxtgwMXphvyUXLyzws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DguMuLTX; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DguMuLTX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A0BFA1F000E9; Thu, 25 Jun 2026 10:17:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782382631; bh=9MHwt/piGbHaBX1U0Ciw0A9tLdy3GnbZtG5V2/pNbH0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=DguMuLTX6L0L9KuizfWkxAATMIlyA8bPMmMhC8BLL5WNrKQrhn2s69icAqPZlU8CB MZViieMuMIAOD3zQ+7RUEHnP9UOboSusmrhpgnnPDi7JR+O6QfvIZQ57gIQiHb62jE Nwk3bgsrKfVAp+6+11oFIJmaMdmzmis/5ta5bpAqI/DbYoZDFXZ9Dqm9mhKkgTkPe6 MweoEk+qHsmyJmKiQfT0OybItJ7gYGadhXss5p8tUZ5GPGxlo0ZR1dNWPVSTIWuKWr 18PnqnWvF5WkYUecXh0qp7EC2AdHh6YlabpOUSeBf+LIZPfQiG9f2uQoRYWqcdfbif uOGhTKvuG6bjw== From: Andreas Hindborg Date: Thu, 25 Jun 2026 12:15:03 +0200 Subject: [PATCH v18 1/8] rust: alloc: add `KBox::into_non_null` Precedence: bulk X-Mailing-List: linux-pwm@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: <20260625-unique-ref-v18-1-4e06b5896d47@kernel.org> References: <20260625-unique-ref-v18-0-4e06b5896d47@kernel.org> In-Reply-To: <20260625-unique-ref-v18-0-4e06b5896d47@kernel.org> To: Danilo Krummrich , Lorenzo Stoakes , Vlastimil Babka , "Liam R. Howlett" , Uladzislau Rezki , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Alice Ryhl , Trevor Gross , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?utf-8?q?Onur_=C3=96zkan?= , Lyude Paul , Greg Kroah-Hartman , =?utf-8?q?Arve_Hj=C3=B8nnev=C3=A5g?= , Todd Kjos , Christian Brauner , Carlos Llamas , "Rafael J. Wysocki" , Dave Ertman , Ira Weiny , Leon Romanovsky , Paul Moore , Serge Hallyn , David Airlie , Simona Vetter , Alexander Viro , Jan Kara , Igor Korotin , Viresh Kumar , Nishanth Menon , Stephen Boyd , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Pavel Tikhomirov , Michal Wilczynski Cc: Andreas Hindborg , Philipp Stanner , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, driver-core@lists.linux.dev, linux-block@vger.kernel.org, linux-security-module@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fsdevel@vger.kernel.org, linux-pm@vger.kernel.org, linux-pci@vger.kernel.org, linux-pwm@vger.kernel.org X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1170; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=L57zDm7ALp0lZWMW+Cln/Gg2DuJozYQVYKA2SZ2s83c=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqPP++uGgipwDjCmHpaSqUlxoMDKEvVyu3KGUE8 sF7dvt/kIeJAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCajz/vgAKCRD6UCkIqsW9 0OiUEAC23l5hDLZ2AuUND5t/t+H3AC8vmplyBqcaI+ow/2SaKVzdc1lyzdq4J7C6GMb0Y8e27gN 9/CIBdb7+/iggRB4jlvgyNKw0MeOj5mQe4qelvVp/Igl1sZDKylK2dLNoET94fZhA7VGjj/MlaK C+FiEPIwA9f/hmhnwQLzRqFo+G+tVnlh2g9pFi22EjIm3Vj6msOoRII5IO7/cz1Af/c5gNDY5A4 tcLI3I5QgittUsRXPFMXz8G6Tpbw2HhBBoHVwtgK6GfMW1p9QCdkV0Wp8EV9Juw5vTWWDcPBXk0 dLoL0TbzDLu5j7iFZGYd9HsalVbC/9+5PGtFQ1F/LkkEFYG6LM1+Gi1x0gKDtaFXbrNUBOrAjTe RWKW27ov//tZM27MrU9+9t0QhGN/Toy36zkfg8FL2idqfWXVFAHmsiTPtjyz4hwXkxLsHR99l1G 0vp6LOc6K5vKriRm7OK0jD1sJVoATw87WQ13c6UOEq1Lp0NiH+GWVLf24rMrFuWjJCbA8m2cpnA rVZVBJ8Cb71JxcAyqLY5RKGmdg+o2khQ9dg8qcu2ikmrnqrhggwhHT7TQOZytz3qmg66SQMyQr/ wySTYLpOuuXwx3AdiXxYAOyCy77nmGLgOTMyjyNVdCnlQlEaCLkiQQqRT+UiOoC0EijnKjc9QnO Z5+1TTt3znsVIIw== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 Add a method to consume a `Box` and return a `NonNull`. This is a convenience wrapper around `Self::into_raw` for callers that need a `NonNull` pointer rather than a raw pointer. Signed-off-by: Andreas Hindborg Reviewed-by: Alice Ryhl Reviewed-by: Gary Guo --- rust/kernel/alloc/kbox.rs | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/rust/kernel/alloc/kbox.rs b/rust/kernel/alloc/kbox.rs index 35d1e015848dd..d534e8adcf7b3 100644 --- a/rust/kernel/alloc/kbox.rs +++ b/rust/kernel/alloc/kbox.rs @@ -211,6 +211,15 @@ pub fn leak<'a>(b: Self) -> &'a mut T { // which points to an initialized instance of `T`. unsafe { &mut *Box::into_raw(b) } } + + /// Consumes the `Box` and returns a `NonNull`. + /// + /// Like [`Self::into_raw`], but returns a `NonNull`. + #[inline] + pub fn into_non_null(b: Self) -> NonNull { + // SAFETY: `KBox::into_raw` returns a valid pointer. + unsafe { NonNull::new_unchecked(Self::into_raw(b)) } + } } impl Box, A> -- 2.51.2