From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5B7ED3ECBEB; Wed, 4 Feb 2026 11:58:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770206321; cv=none; b=uVogzLK/poJWTOzGdDgkY5pF2IUVNy0zo501n3FkagEMjhLlV5wSaX6i9jtW/j8S95dsZW6nGnCLDmPkx4s3EPWFRVFxbnO7CSncU7itZ4DO0/WLfbYa2uugrNkwBoBggFB5DxvozpxuZeK1tA6eHoB2zi0FjLhxTYrKbnGlgxk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770206321; c=relaxed/simple; bh=4kJUgBgTj0V7kRaDlo9MltCBPjRgIT4dj8eMOKXfB5o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=QB/Z2st12jq7YoqkLNqfH1TyjxUWpphJEc0s7WFWhGMN37TkfyQ2SOhhqSfnPd1zlM2Gl8t6x6irRfjN4Rb3zLdQtL6vy5OY+uShQ7dAy4vKVRFtOhXCsFjzT0rlLP4JDYXbxLcbRbEX39EsC6WqaCpZJHnZp5lXlQiQb7+dJH8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Gz7NyLru; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Gz7NyLru" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDB73C4CEF7; Wed, 4 Feb 2026 11:58:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770206321; bh=4kJUgBgTj0V7kRaDlo9MltCBPjRgIT4dj8eMOKXfB5o=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Gz7NyLruiwim/m3qBSE5DCyGcBGfDnNAOVb4JpibsYAUsWYSmm1MpCPHgWwtj/fRE e8VUFzL72M3Zx6A1qZzoh/IA8ii2wIC7I4cJhh+uULDLUPyMKnEvCcEKQxVOEmnib9 DoSHh3MiiduX7HJcOEoYvDR16yqzuWAG0XdMb3TjJ4hksqK25J8oJA81S9JdyO6hKT KumBA+dRzkFBjLvTQYFQ6GwuEX6rkbvQzlazbWUeATLs2BAmRQQCZoHCpYtJV8wBG0 WlW6SNySBC1jA+L56+L0NXtFEY6GCjF7HOrLV7AMDGIWW1Tfv0xJw3TcrW5yiutEIv NrzqX1zgg14vw== From: Andreas Hindborg Date: Wed, 04 Feb 2026 12:56:53 +0100 Subject: [PATCH v14 9/9] 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: 7bit Message-Id: <20260204-unique-ref-v14-9-17cb29ebacbb@kernel.org> References: <20260204-unique-ref-v14-0-17cb29ebacbb@kernel.org> In-Reply-To: <20260204-unique-ref-v14-0-17cb29ebacbb@kernel.org> To: Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Alice Ryhl , Trevor Gross , Danilo Krummrich , Greg Kroah-Hartman , Dave Ertman , Ira Weiny , Leon Romanovsky , Paul Moore , Serge Hallyn , "Rafael J. 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Howlett" , Viresh Kumar , Nishanth Menon , Stephen Boyd , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-block@vger.kernel.org, linux-security-module@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-pm@vger.kernel.org, linux-pci@vger.kernel.org, Andreas Hindborg , Andreas Hindborg X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1098; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=4kJUgBgTj0V7kRaDlo9MltCBPjRgIT4dj8eMOKXfB5o=; b=owEBbQKS/ZANAwAKAeG4Gj55KGN3AcsmYgBpgzQGWPeTkfQ596Yd1NnAfAqNezMquqK4g6o3T qdh/ZoqiCOJAjMEAAEKAB0WIQQSwflHVr98KhXWwBLhuBo+eShjdwUCaYM0BgAKCRDhuBo+eShj d4iLD/9Q3u3EUkTrf71/HDEO1t/JE9RtrcE59R/WUUVHVBm36/KFnyuhWlTrS9tw/VZFWtGQ8So sTWdaMtJWEC2q3QQRpNIfuFJ+Z/+jGK5LZPDwn9KXSQXO72OFyCHmoxZ8S49BGHkcXC5J36BddJ oBhV1NXLnyPAz4PFYpxCpsyaIvY/ndPSnFXUaDUitUS6k8jXTbQnIThXtMjwRQYwvoZ/WV124sk UEf0NZdBT/tTHHljmTjmsBsfh/s31GgbOsBRNZlgQbEn1nfIKUv8rkWWsiMc2z5/CrZPZFNLLc2 dvo/sOb/S1/XSyhIfdqBW5nu6XT3aIsRyQBNla6glkOxnRCPVwGnA0cVqLJSwGDC7HwdjQp8tg3 6OpsRLLpT8i9c7RUWvazHkNpzYJVUiCdPvQ6bTtgozQcZ3XftPlRnYqaUc0MKuQrDp32ITc1Qpf 2+NdHl7Ap0HGYUDWUouSvjzXWw3qRpzVu9MDGgzT/Ov44EEz/z8ouTVC8G5/wtYG2DvJ2Vt29g9 weNYSK06rZyCIJ+f9S4SG6AsSmYmsH717vhWbdgv70nWR1sWbtA2U+0U94cRyNxeQLnmIvuY9CJ jUyG0IGKuA+MPWHoxjeNdu0VkFmHoW388Q536eQxeCfpBS7lljXv3TWUIUBmJqIKc7HOg81GZK1 dE20j3imAjE0sfg== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 Add a method to `Page` that allows construction of an instance from `struct page` pointer. Signed-off-by: Andreas Hindborg --- rust/kernel/page.rs | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs index 4591b7b01c3d2..803f3e3d76b22 100644 --- a/rust/kernel/page.rs +++ b/rust/kernel/page.rs @@ -191,6 +191,17 @@ 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 valid for use as a reference for the duration of `'a`. + pub unsafe fn from_raw<'a>(ptr: *const bindings::page) -> &'a Self { + // SAFETY: By function safety requirements, ptr is not null and is + // valid for use as a reference. + unsafe { &*Opaque::cast_from(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