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 1CA1D3F4DC2; Fri, 26 Jun 2026 11:56:24 +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=1782474987; cv=none; b=a5vfyZT0se/LlXjagT6jqDE7g0OqYw6aej7LbeoDHTaxY04xSJL9rKjrpfh0mkTQA2FKqy9c8HeaZMfANaX+UXsQd2Yv/OD3NAg7zfU0ZnPnH5nAt9/WvZhQqzBUckWJ//xxZhutHogziR1YthTuxrxyrGVCNbtkOOpGPv2y2qc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782474987; c=relaxed/simple; bh=L57zDm7ALp0lZWMW+Cln/Gg2DuJozYQVYKA2SZ2s83c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rb2rK14iGiEfHVb6aQHhaUfB+5f0kxtYwWLZVFIVIt4Heauqqw9let9rB0pITjPcL1CFTxQTA/l+EGE1Av8+MVTcnOybrAxvzaenx9SFB7LR4S3MEx9lT0uFaDqEacS2VuP6bsY6CVmc5Scfb9JNF2Wl0SXdAjCbnyYoW0tqGvM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HkuZ7XBk; 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="HkuZ7XBk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32BDD1F000E9; Fri, 26 Jun 2026 11:56:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782474984; bh=9MHwt/piGbHaBX1U0Ciw0A9tLdy3GnbZtG5V2/pNbH0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=HkuZ7XBkNBbPpmNh0jHv41Wuw70A+GdUFYjWET1qmXcQIKjTVrIaymEhyhQxZiJDQ OYQaC+YTngeDtEXGcTZg2nrhdNP6R8cyrSArn0Vcg4mmq7Hto8gxALTcWSWfRU8kgb i1NX1hBZ94yWCUrkJOY2045ItoVFnZTRZkQr1dHUJS9nY+rKTbTq6HIwWBAr/01JNd oDiP18WI45XFmDdzBNkxdUAOofCB8I9OwzTdx5AOBXno0NZp0mktQRseoVeUXD9ds/ Ea6yM6KoBk2H/UJkJmv+1gH1PriKePYHNbY2wWHbjbguzGKMCCtNXrSSLLiaCwHwV6 ioGjyljtNEVjg== From: Andreas Hindborg Date: Fri, 26 Jun 2026 13:53:58 +0200 Subject: [PATCH v19 1/8] rust: alloc: add `KBox::into_non_null` Precedence: bulk X-Mailing-List: linux-block@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: <20260626-unique-ref-v19-1-2607ca88dfdf@kernel.org> References: <20260626-unique-ref-v19-0-2607ca88dfdf@kernel.org> In-Reply-To: <20260626-unique-ref-v19-0-2607ca88dfdf@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/ZANAwAKAfpQKQiqxb3QAcsmYgBqPmh0T9NXm2ekfnSlVS5q2a5Nkx3elel1Z+sUE lVzxvaywm6JAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCaj5odAAKCRD6UCkIqsW9 0GQwD/kBPhAfqhuRT/wPQuyxM0apWmNdKJ15rz0l+MH0DxUqynfkKds77p9Ba1hBaXZEiIgHmCH pDIBbcmrQR3ZzjLNEC27ic8X6+BdCVjQKsQBQWJ7NKui+imMc++MYWVIYyM0r0enlZe2kmN8hO5 neGpUe0IvwQ3Lj6UWc6ACsUoOIJ/VSSl4SFZNnkH2SbWvbImu4RPT5mmyv3heMJ9g65NMAedvle tw99mHlW+RMWghmbVY1G0CFXcrMFX/ICi7lpll6iz01cgmdWZ00Zk2kIk1MDSePNSLkiHcviPYo eujIyeR9+opejbUdjMsWAJIqUz1K+CusSsy+pMB9t+0TM36BK03TehWUHzki1rXsWQby8KUOQx5 JtTsLGUeCdq8jj5LJh7ikHfha1V5+4WAgb1NU6rWbu0HAaCDeoUfacnX5DMEVlA2YDZYl6lGSYy LTe2rZntwugKRllSVNPfbq+vpbu4eh/00OZ+rZuo6jg4qjxcaF8bpEujK1QOVaT6mqH0SIO6fL7 dafroHQszbX998/omhRnZ/sCkPDELv4EwBaAlkTH7N3G0DsXiUEUx3nko9wa630BA3dS1kWBvKn cRx4J3Tc31/zybazPxJ7yei5pHjMTfOHDnSsGrWwiXODWfvRUZiqgEWUO3S3KJWIZpG2VabKArA vHegIagDX5flLQQ== 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