From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E8A3C0015E for ; Fri, 14 Jul 2023 09:36:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235799AbjGNJgX (ORCPT ); Fri, 14 Jul 2023 05:36:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235743AbjGNJgI (ORCPT ); Fri, 14 Jul 2023 05:36:08 -0400 Received: from mail.marcansoft.com (marcansoft.com [212.63.210.85]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8D533590; Fri, 14 Jul 2023 02:36:06 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: linasend@asahilina.net) by mail.marcansoft.com (Postfix) with ESMTPSA id 81EFA5BC9B; Fri, 14 Jul 2023 09:17:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=asahilina.net; s=default; t=1689326244; bh=qJo7mYZ92ZVzEhgvxpERMJP/merzZqrWhb59Z8XEN0k=; h=From:Date:Subject:To:Cc; b=ASk5n4CnvsESI2z/tecTRAvXqRKZ4wFHacuFAWJHfM38PBGB0zWdtQnwgt/EZun6s A1oLjkZMXu4htW+YOLmyGuwUYv8A4iafoJjlgVjI9djMSnDpYGwc6iJgUkNQNIeynB 6ORsj8QMo7XJfCACQdbxCNEAQsD5qKzxUVkgjHxAIkUsJl9HxnF5wLSmE/aCo+Hp4M 6lMW9O7xK3HW56xlh7mxLmI84iIXfd0jwStYSZEdLf6DNdr5PW909xo1YK9qIxrlkB e++xCU4LZUqad22/hevlsdN9hNxid6MOXAL95MHdqdRmd/+rmBumi5fV4VWshBX7vQ cg1CogqR45Iyg== From: Asahi Lina Date: Fri, 14 Jul 2023 18:17:16 +0900 Subject: [PATCH] rust: init: Implement Zeroable::zeroed() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20230714-zeroed-v1-1-494d6820d61b@asahilina.net> X-B4-Tracking: v=1; b=H4sIAJsSsWQC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDI2MDc0MT3arUovzUFN2UFAPTpGRzY/M0C1MloOKCotS0zAqwQdGxtbUAjkp eH1gAAAA= To: Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Asahi Lina X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1689326241; l=1060; i=lina@asahilina.net; s=20230221; h=from:subject:message-id; bh=qJo7mYZ92ZVzEhgvxpERMJP/merzZqrWhb59Z8XEN0k=; b=/0R7QoF0o5fRt1iGDE6jPrr2eE28drfWrZESrdhNbNwynMxHwuBVKvZKSoPzlgKPC6hNC8jWy heVaSsDCaPlCGkQ8LqGPG2nsisyLGbN3LrdUTiQZbyJt2ztAXZgdURV X-Developer-Key: i=lina@asahilina.net; a=ed25519; pk=Qn8jZuOtR1m5GaiDfTrAoQ4NE1XoYVZ/wmt5YtXWFC4= Precedence: bulk List-ID: X-Mailing-List: rust-for-linux@vger.kernel.org By analogy to Default::default(), this just returns the zeroed representation of the type directly. init::zeroed() is the version that returns an initializer. Signed-off-by: Asahi Lina --- rust/kernel/init.rs | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/rust/kernel/init.rs b/rust/kernel/init.rs index b4332a4ec1f4..c300ce39ac10 100644 --- a/rust/kernel/init.rs +++ b/rust/kernel/init.rs @@ -1354,7 +1354,14 @@ pub unsafe trait PinnedDrop: __internal::HasPinData { /// ```rust,ignore /// let val: Self = unsafe { core::mem::zeroed() }; /// ``` -pub unsafe trait Zeroable {} +pub unsafe trait Zeroable: core::marker::Sized { + /// Create a new zeroed T. + /// + /// Directly returns a zeroed T, analogous to Default::default(). + fn zeroed() -> Self { + unsafe { core::mem::zeroed() } + } +} /// Create a new zeroed T. /// --- base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 change-id: 20230714-zeroed-dd05bc737f85 Thank you, ~~ Lina