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[2620:137:e000::1:20]) by mx.google.com with ESMTP id p9-20020a056402074900b005218c27b193si3018838edy.501.2023.07.19.07.35.49; Wed, 19 Jul 2023 07:36:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@proton.me header.s=protonmail header.b=Hp0gqBpu; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=proton.me Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230268AbjGSOVx (ORCPT + 99 others); Wed, 19 Jul 2023 10:21:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231536AbjGSOVs (ORCPT ); Wed, 19 Jul 2023 10:21:48 -0400 Received: from mail-4316.protonmail.ch (mail-4316.protonmail.ch [185.70.43.16]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2CEF519A3; Wed, 19 Jul 2023 07:21:22 -0700 (PDT) Date: Wed, 19 Jul 2023 14:21:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=proton.me; s=protonmail; t=1689776469; x=1690035669; bh=ycSUa09BWmPYG+p0T3v8MXq1UGIxA3oXkswxIya2goA=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=Hp0gqBpu5Kg0lTyFWlOUxr4CFlT3YRUF3s6qV9d9wWK/qCU6Myt8GwZT33ypBSzwr ObLAaGrCb5pyVC4sZP4dDzVQ2xDgRuV8aoiFTfnNYJtdyTpUxUlK092JCDkZaprUCQ SfkSLTY8juIJkd6chETk2t54ejpvmenxydWJKtB+8DWFcUBG7MS1eZ2YV2UzcoehUJ Iwu2LD9ZycYtUouWT6KEvAhhdB8SHfjRQmVJa4rw3qmThKvHfBk4P8zPdPmF/58OJ4 eDQ+7Fv5minHxoZPSKEOohDsQ/sncyXOewAsZ1xjPXw86/64mGl/Fobzesg8qiWvSq ++0ATtS+WotfQ== To: Miguel Ojeda , Wedson Almeida Filho , Alex Gaynor From: Benno Lossin Cc: Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Alice Ryhl , Andreas Hindborg , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 09/12] rust: init: implement Zeroable for Opaque Message-ID: <20230719141918.543938-10-benno.lossin@proton.me> In-Reply-To: <20230719141918.543938-1-benno.lossin@proton.me> References: <20230719141918.543938-1-benno.lossin@proton.me> Feedback-ID: 71780778:user:proton MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1771860001218102531 X-GMAIL-MSGID: 1771860001218102531 Since `Opaque` contains a `MaybeUninit`, all bytes zero is a valid bit pattern for that type. Signed-off-by: Benno Lossin Reviewed-by: Martin Rodriguez Reboredo --- rust/kernel/types.rs | 2 ++ 1 file changed, 2 insertions(+) diff --git a/rust/kernel/types.rs b/rust/kernel/types.rs index d849e1979ac7..f0f540578d0f 100644 --- a/rust/kernel/types.rs +++ b/rust/kernel/types.rs @@ -11,6 +11,7 @@ ops::{Deref, DerefMut}, ptr::NonNull, }; +use macros::Zeroable; /// Used to transfer ownership to and from foreign (non-Rust) languages. /// @@ -251,6 +252,7 @@ fn drop(&mut self) { /// /// This is meant to be used with FFI objects that are never interpreted by Rust code. #[repr(transparent)] +#[derive(Zeroable)] pub struct Opaque { value: UnsafeCell>, _pin: PhantomPinned,