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 BE54E3C9ED5; Thu, 10 Sep 2026 09:02:34 +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=1789030955; cv=none; b=nWjVHlIYupapATZPcZaDu3r3XAycvBCvmyrT9WtkKb51nr5242wAjbh/Ta4wEWZC9O0QNukj+7wK4WHxo3VQEnc48R5QYp0xUPDn5730fchLzywBJ0LQd+IAWtrYQN6KW1fNbcOroVMYByzAlk2uijBC1XxECY5yaZWp7AnCSPg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789030955; c=relaxed/simple; bh=WHW93VvrHeXgOCjNosfBMI4vPnTOHHkUoJXKjGlJMdY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hFlmSFtP82uGRHKtPxj/xTkKkKdPliRU+4zg6b9afpduo9ddj9rk6nc8EkrcdNqJhbpxBN8Vd2AyoO7dq7LDEJei4DkNv9ipr/mdOOzcP3C3Nq44F3NPcDcgujRpWw5sYBGE8hH8fsLV6MpHSH8PA0gbrGwR5TQs1Rr1+jDQE9I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=If5M6sRe; 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="If5M6sRe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA4011F00893; Thu, 10 Sep 2026 09:02:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789030954; bh=bi6HQbpS7WbVT11MZapyDiTA6f2yGohKV5fr13xqRJc=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=If5M6sReucxfAa8nllZsBD5rzyKL9ELmN7J++KhzVHXMFwuo+ywIXweYK0qHvKt73 1DlZC6yieZdrctVpoPbK8xAnJ01MqKDgn8JNOrREKfLrtY3kuk1QD0WFmmwZvIkpKc cjwQhwi6gfGiK1mJpr70MGacbhPTAkvMJSrfODwcnkW7h00u9xgR6Tozex936pATmf Y/e3g5Q+e44jwwElZlmy2drakal4M8C3ZYhzWEtU1LZSzTfNXyLU3yRFX7wXmiz5xW ThtO/NXMID8mQwyR1hAETqMn3NvdBwCEMEnIpbQLdGFzMn0iPU5Qgbppp1CAYsoqRp rYXsEVBqyS45Q== From: Andreas Hindborg Date: Thu, 10 Sep 2026 11:00:05 +0200 Subject: [PATCH v21 1/9] rust: alloc: add `KBox::into_non_null` Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20260910-unique-ref-v21-1-e83257373062@kernel.org> References: <20260910-unique-ref-v21-0-e83257373062@kernel.org> In-Reply-To: <20260910-unique-ref-v21-0-e83257373062@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 , 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 , Ira Weiny , Matthew Brost , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Ira Weiny 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, linux-usb@vger.kernel.org X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1188; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=WHW93VvrHeXgOCjNosfBMI4vPnTOHHkUoJXKjGlJMdY=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqonGhYtutHmW3K5/iWt2PtNR0EOOEvKOh8GOE3 cAXhRn6VpqJAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCaqJxoQAKCRD6UCkIqsW9 0PiAEAC1ZaUVBOkvlRXYa1uoG7fv8BkX7iuoYs3OUE6Xs7RBS7CbugsVYpLdGgml2yB5Xo/AfF1 lOrJHP03TKEIawI0QIjvbDUNXrYGXND3iwPfW4oW9EKyBDMM7aQlMGM2ptkYJDcGzux3kw7pAqx zYjptUpVSESYUlKv7c6+bSMK1AeydAw1bt04eyJrzPRMgus+QTTFKWMkFU2w4n/A2Vybuz6QDSb +gMpzM9B3XcB5EYFx92khT1NMRiQsSRHxCc54Ro6JbS9nA7SFf4X1SRG2ZwFwEYJQw4+P2eXu/B kn8z2qUOFN7+DY5TEDT7kwV+OE7FFgKaMjSOLZh48VmeDrw9fYdtqIKT7xIuy1KqplTIuTjsNpb Iy++9Nqzy8yEHUWDqdzclvjSepDS5DSFpG5VMDldAC4AENbijZpOJVJwq41LMojHASK+t1NsF2T t6P+wfaQTuumBObShygOAi7WRMKfgFIBmoMisdn0c5sE+W1UPIzdRH53GVM7b8aY6Q+rsRPEu32 rNoYVKX1ZCSGlH/Cai+CxLnb58kRzvOkj9jCMjG804rAMG2AgG+ExQoP1ymqRN4D8kik1NLlEy3 5yp5HL4qYcm91XRinv0cXg5icrFwfKuSpkpNl0UuMdJs9OSwTJV3P5cjHJpDbgZcd/sKdO+4yNt KzVWbdwXn+Hi8TQ== 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. Assisted-by: LLM 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 c63d6acdbb6f9..27c31120c3854 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: `Box::into_raw` returns a valid pointer. + unsafe { NonNull::new_unchecked(Self::into_raw(b)) } + } } impl Box, A> -- 2.51.2