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 6DBDA259498; Mon, 24 Aug 2026 11:19:27 +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=1787570368; cv=none; b=vEfvuLLwPIaVWxHympWmxD8fgm8of3/X3dtIjx3W/ON4jJkWv0CSDitEqY9d1JuWSJOOOvjFck9awjkhNgMohptTu5h6tYzhYC/EJownkfpa4Z7kp5TMXMhUJ+iSPuXPsZ8HvSI+PiYuBHdw9A//rxPZw8SRhoXDpb/GPmqHkcI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787570368; c=relaxed/simple; bh=Bz9Y+wuriC6USNq9dghH0Oc0RgRceIN5mLKgknmkXjY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=EYYHKPsSwSU2Du+fUli7vSi2BW+WvBt0xX+VpOl/r5BsIXPoVGLd3yMUqVZt7pXMHwd0uqXibvubfRry+VujvF5ugM5QHy5vkLrPxDrBCSF3uwsNLEqDxBiEKXOWUCIvxaK5Pw48ZOx2BIaJX1/lmm6XQbFU7RkyEmeTQ7zPu9k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Pt9mYJzd; 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="Pt9mYJzd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2A601F00A3D; Mon, 24 Aug 2026 11:19:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787570367; bh=9JfWIbwT4//CafJUB37oPZ4gAJDTQRPaodJm/XlS444=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=Pt9mYJzdHdzl4fQzAVrswSnLK1ugEdizF+iDaboQyRXVOzra9ZiPlB/Z3pAX+gRQ7 FlvuxDHz487tjiESkDMKQq+qrWU6tUF5KyEJ5N5EoOqXeSYHfees5b2NvdTeY4JzGg 2ASC/szsGCPUbmXMcnP1YJhN9Voj39B3hlLhHUJuupoWLcKTtNJUxQo7g4As96pJBw cU5Waqa/ZJ9kBvahCcv4atl/fAiNgenV8MSkoIvfJkZNk75BrLcCFbWc0jAzm+P9bx VoTqsK9exzJ0Pevfe9KOF4zMp5ZeZG/LPDRC+HadCNWknQmgUdkQPzSBjTKZCbzQD8 BIsVt7vDKq/Pw== From: Andreas Hindborg Date: Mon, 24 Aug 2026 13:17:53 +0200 Subject: [PATCH v20 1/8] 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: <20260824-unique-ref-v20-1-490735672187@kernel.org> References: <20260824-unique-ref-v20-0-490735672187@kernel.org> In-Reply-To: <20260824-unique-ref-v20-0-490735672187@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 , 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-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1170; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=Bz9Y+wuriC6USNq9dghH0Oc0RgRceIN5mLKgknmkXjY=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqjCiANjOTA/QLk0NbdgT+Aipy/VQqpA4/e4r1P uWaXDqaFq+JAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCaowogAAKCRD6UCkIqsW9 0LcUD/9JlybCkRh5vp32gkmPMvQSq6QcOhJid/ktAibn3taPc2bE2UpUDNFbJn/mQH7ZVtCu1ZM Tuys8Ev6iAI3y5ohAEMU7v9qE67FroO23PPZqT3Fo/KhIAFQYpdvy5BC5GdaHEnW0RLQr/WpR5C lrzj4oZaLV/RfEkuTqzwgr/RcT/tNk6g95wN+JCT/GX28fo0bksGHfkal2ewedoOfK4REnj/6W6 897sw2bg+rKaHODMYi3mNwWJ/nk6crdtLhMpFjaV1m5I+m7PAKhrFK/J859fg6GceYm6Qk2qIuv h2xNuhsDtW6kBHqkN2FjJQSDvsjUozwkUmr3GbpsjE99tnoN0+LzFcKD8TafAZyBQESTkAD83t/ Dpo3yEG6fZUHtdq29nvUu1TDnotfGPxdUDGLtKAlpvVnxGvfaC3OnEkGrsNgugffVt7ObVl+d3E UZtUeA30SEzENwbdDvDLd3/SDxlBkY+vOTcv+Cxo5ZRLKr1gTMiLc+NWBFRyZWbLjboFrSDWOJf GEkBbnGOC23EJMljiV9hbphKVdr8Vh1b5XdRjMkVjl9g0HiMYMlzPRxgYyFn6SIwNxvKiFnlwoA JyBfok+kTwA5TiP6zAWy+d8Xo7+N/0qPbS+AwCN2XkIrv8K/hLcpPQrIUYclplEKXVyQwS9CoHV AblCyvWtJHkb08Q== 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..e6c637bbe2009 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