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 5A02B408602; Mon, 24 Aug 2026 11:20:24 +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=1787570425; cv=none; b=kUy5bsi/qQ9Pz4E6C8ShwTWl4htNd4qve1NdwgAfesRYRO0n2VzB+YwM3Sw7xdNZoulkqBO0qFC6hlLfDbCX4vAOEMPCrNf1DXQ1Irs5+ASqDwh/sJOYa6sjcetqVykePfWLmhM3DiPmz9/cQlxWSvBrXRub6r2ZiJinO5+2rS0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787570425; c=relaxed/simple; bh=vSOqJFayRfX2VpqkoQBcpBdLMfaWMqIb6v/l01/Pb14=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AC82DknoJ3d9xUDmSBz4qsBqhQkBJxLNxkePwBwIY158adW+dNfDYSk3qUAJuhfy0Y3V176q7Ui93wb54ZbXAoSnktC8dDCACeuzxqyo+O202NjbMmuuzLOCP4rQrJQqp3qZNArRKEy7EXkS/nsNWXAbvITgijtZp9CQ4yMmEc0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=T9EW113i; 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="T9EW113i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56B1E1F000E9; Mon, 24 Aug 2026 11:20:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787570424; bh=gsf4C31WIGEdvjURLO6bh8+KS225jhHsASFOIqCjPTM=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=T9EW113i0F7o9cpyn0NKMrr4qzmRV5ZF8U/NZoyuc8hneKIS+m7cpuDvzSVgPWLv3 UZ/T59ijq/leurmQCv1iHl0cmEuk1NIzbIWD6fJx8EeAGt6U1JI1XyOxMxA5DDGolk cgOQmWmEn9qSTztT73EmE54JnIvSFMBXxz1qP+EiXrnNjG8t7VS3q0HgSuto+OVHb5 K1G1+3cT4C6dI3/1VVHMRa7YVVcSo8rBEa8pYN4f07pLSh1dQdd8A+63hq+JoW803b 2R0aVMMZrfm+rKheifoo5O0r8MXv+DayvLLCFDSDOnBonW+N25ZJmtopKH8uu/+ZSn N3LkyVXe2gdQA== From: Andreas Hindborg Date: Mon, 24 Aug 2026 13:18:00 +0200 Subject: [PATCH v20 8/8] rust: page: add `from_raw()` 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: 8bit Message-Id: <20260824-unique-ref-v20-8-490735672187@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, Andreas Hindborg X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1324; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=wkOYacmcCbns70mMJJNOqXe3g11b+kHYA0S0dbdXM7c=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqjCiGqEXZYrPpUe2ITj4yrNHK12u5/qghuV8op wHiEF9/CzyJAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCaowohgAKCRD6UCkIqsW9 0FasEACY3/FKckvX+qb6nS6iG9Xov+RkCghkBwWrcp/pKjcC9tE3uc6u5dni0Jlv0phoXM9ZRCq 4Oiskvu/fzDYM3OpBsN5yPrYo5z4pHMgQ1iyZ/E4PT2Qt3U5csMyACtNOfzK20rc5GW+JFzxdSm GIwUm1bZmMmmNMMZRB+8ErW6F9CbksrWSHSDwxAJMAQE9ePY1NSP3y5e06cyaZzR5dJmIbd8Qhr iaKt2yKFZKa4w9XJTygaZ1X1ufWNpW0NaoqexhZ0Gw1ms6cMuvFEjI4/N/xLlD5YPdiEhExs0NT qqL2XTiWvEQ6MqT3NkIe0DeoXtWwmA/KXc72ctatlG4NwhOrqjPanKOBFztt2qMEGDM8l4FIZlL DpzZe+X6qPhXJBkNVuMQxBhztKCpOjbSfd32N6Lj/sZX6MIrzjOvvAX/lkZodnyZAqNctVA6OEx cEtPjNHNN86XW5r6RbLvk/5f2Xz9Ma85CmnI7b9PMULgpQ4y9DKOXgxQqXwyqph6gf4Hpz0DZ5N 3Vci9dlrdolAiJLda0B0TkW4nnyv76G3i538Khhkr6C/u8tAJfA7Bb6K/GM3QJew6tJBXduGUdx YYs+T2vtUZz9CkjJrbvnHCPMJFQMH9cbMvEkos3w8s+D6i03ispYF0phnZ+cSWLIoLItRLQxpFZ cqeuQ7JvqxT38Fg== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 From: Andreas Hindborg Add a method to `Page` that allows construction of an instance from `struct page` pointer. Signed-off-by: Andreas Hindborg Reviewed-by: Onur Özkan --- rust/kernel/page.rs | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs index e807ffe3cfef..32dd030c8315 100644 --- a/rust/kernel/page.rs +++ b/rust/kernel/page.rs @@ -144,6 +144,20 @@ pub fn nid(&self) -> i32 { unsafe { bindings::page_to_nid(self.as_ptr()) } } + /// Create a `&Page` from a raw `struct page` pointer. + /// + /// # Safety + /// + /// `ptr` must be convertible to a shared reference with a lifetime of `'a`. + #[inline] + pub unsafe fn from_raw<'a>(ptr: *const bindings::page) -> &'a Self { + // INVARIANT: By the function safety requirements, `ptr` refers to a valid `struct page`, so + // the returned reference upholds the type invariant of `Page`. + // SAFETY: By function safety requirements, `ptr` is not null and is convertible to a shared + // reference. + unsafe { &*ptr.cast() } + } + /// Runs a piece of code with this page mapped to an address. /// /// The page is unmapped when this call returns. -- 2.51.2