From patchwork Mon Feb 26 09:44:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alice Ryhl X-Patchwork-Id: 206541 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp1973655dyb; Mon, 26 Feb 2024 02:08:03 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCVBkUOShauXkunYMrF8y5seY2xzwcYnaElwC8rsV+8+eaCsBtJuHNa1oj+iy9SvL/i1BnlMCcDuc5SCte/Dfecke5xhGA== X-Google-Smtp-Source: AGHT+IECUhTRhnIZJBS8lITTmerQZvL/LC02dTz2NksDbIPxXr33483hBN0d0EFLQ1QqDgmP5Rw5 X-Received: by 2002:a17:903:182:b0:1dc:88db:12cd with SMTP id z2-20020a170903018200b001dc88db12cdmr4802030plg.27.1708942083720; Mon, 26 Feb 2024 02:08:03 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1708942083; cv=pass; d=google.com; s=arc-20160816; b=AP5dVW9FRFpW2ojzKQ7bbkjJ0ESJdSyyNRiVCZINkfCiysuIjZVKgb8Dvqci5+2637 7PnM4KpAPbuCCFQWP1njuy5ByVoyHCqPctdedW6aWY8EW9KHT5+POj9qMqp9PRWRVHVM kzLD0NO2JRPZa4WB8kFRzqUWTMLVNAADP5JnF9Kw9E9qs4hHtr3mVner6yp88U/MGXL7 hTDo0KgkqFFYdFzTa30CpBAPblVkxSsZGHFpWU6+KmMlcy9GXm+PxlxSWr91S8uVwmvd oyO2J3+fjEcfLoqspkpLzgp7ojZ5YIbnFMkqNTta8NQNCTrS4BeNPVuKvVOrgZT6K94k 52Ug== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:from:subject:message-id:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:date:dkim-signature; bh=QOSt/iG4gYTayLNw5qzpxWVv2v1rK7cBXJ7GmDghH0I=; fh=o08zmPWHgN5rARrCETDxU62XetPUlyMUdwov2xz99UU=; b=TtaezLpRLpQHgY7IB4teTuTDvAdSz1KHTBFVJcaouIF6U83PVthtF4AXJOkp2QWidi IM3yTPgrnRJ3/pkrC4TowQr/KBn4CFJ4CMeNfRz3Kc3W7qDmzUCDWKCXUTDc3jtxOqJK wvh2jwX1C5aFJxHABg9bYQlFIlNS0cJUdxc1QW8W1MIFEcplmxFQYgZFW521r9tix6eL wE6+58JicEC92vJCqQh8y67yO2xcRml5Svj3MCteCxHsdfwoTw32w0B7Ghi4c9EBLraI z22qs6nGivWU8u1C2wcdcmJqK6IVFWcNg4401A+AcnsA6xznRMl+fQzhqAsjRvGpvsJP 2ayQ==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=CyIq4Ip9; arc=pass (i=1 spf=pass spfdomain=flex--aliceryhl.bounces.google.com dkim=pass dkdomain=google.com dmarc=pass fromdomain=google.com); spf=pass (google.com: domain of linux-kernel+bounces-81085-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-81085-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id f9-20020a170902ce8900b001d9f75f7632si3416315plg.344.2024.02.26.02.08.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 02:08:03 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-81085-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b=CyIq4Ip9; arc=pass (i=1 spf=pass spfdomain=flex--aliceryhl.bounces.google.com dkim=pass dkdomain=google.com dmarc=pass fromdomain=google.com); spf=pass (google.com: domain of linux-kernel+bounces-81085-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-81085-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 1FD5D2867A5 for ; Mon, 26 Feb 2024 10:07:53 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A5DD860EC5; Mon, 26 Feb 2024 09:44:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="CyIq4Ip9" Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60F131C6B0 for ; Mon, 26 Feb 2024 09:44:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708940675; cv=none; b=mrtiru6Wk5rdNcTRJx2JgKWpMpJHK8O4DDZ/k6gpxLD8/uwz+ZHQuIYu9L5QLzoYW9mJd27jwawkjKilN1uXUNxbnVxraaa1LB5+XGJBhqEVOLcIudPIH6WC7jL3Q9wQ15pnMs5K987VBBJncqhmLSrwmJlcWDQvIp64h9quhKo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708940675; c=relaxed/simple; bh=vDAziiFfJZc6buVlmJCiloA6pDClgVZnZEp0wK9gzmU=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=dptUZxApc2CqUe2+Zv4RDhllxFFWqWE97btZA+YRQu6YR7gi8qCcn3jndFd0d1kZY7Idv1Tl82NAFBn1LN8r2X/o1HirmVBOMkTJCe+Q2iBsvpMh2GfosLy2daSNyjOP7SP7AnhplceJg+e2eRZCHcqoylE3BJthRuFB6jO/NjI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=CyIq4Ip9; arc=none smtp.client-ip=209.85.128.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-608ac8c5781so49929887b3.3 for ; Mon, 26 Feb 2024 01:44:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708940673; x=1709545473; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=QOSt/iG4gYTayLNw5qzpxWVv2v1rK7cBXJ7GmDghH0I=; b=CyIq4Ip9ocHDFuRXVTr4Zdfwyws5JUtuMx4Am06w8yQiNMiJxZAv+DftULDmfLaIiG HZfhhoxS+LdvkMusFqbyBcw20vhFI4YFTN1/bYtp/6QBIbOxa7uhIDRd53v3lhAMb6wr zACsheEKqX57wYqTUeEPLB54kciUw/anJDG3GJecMLDdRpY1dqx9Q5iW4ilBL+PB1eFi lvx+d57A4t+sbpY4yiTfT0uOzFPumORgbiVf2xYlxeZPpwzRQovtE1fPKQ69KBXG7ybR eO5TsltxZpAcdd0g7AJZL+/kHVXMopoRhT07Bj6lLOPN7xF2AzRjweE7VpuFBvJIbEyp WIyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708940673; x=1709545473; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=QOSt/iG4gYTayLNw5qzpxWVv2v1rK7cBXJ7GmDghH0I=; b=S8Ndg/VSiI7jyRf5uvXJmgj6iKi4grfWrGAe2kwrUKCcH2fJF1PR6+WUQbJICfS+Bj VnsM0Y374B1qhSBGdEJr/VJMKrQh8isBvAPK6w244CKf+bmO+JO79EOfsc+AjCjjCrpu 8+4aEaSDrLnp1GyRtR6v8jzWvPNx4wSAetv70wlddWxgqYUlL4+2IzK4LL+fOdW9X7Jd OIJlKE2NRaoL8l0kn2yHrFwR1J+FEmg2WTB7VXZD/NwloGs0IJ457xv85Vw9MbFLeBLN AqhLvInEwiKpHyU4Ff1SZqIaYZJyBUSypfQ50qX4l7u6rUeVdVIhIL2GuO+Ay+KUZkXf wkug== X-Forwarded-Encrypted: i=1; AJvYcCU0nqVNhMnEuc3PzycmcuR8kn/ODBpvj2s4RTpyEb3RnDbd81ZDxvwbkA7QV/lP6z3uw4MPpVJgZMvf06Pux3VdUhxL+n8hBhUUYxwv X-Gm-Message-State: AOJu0Yzv7zkoVnPhvi1kKnSws323rmcOoFBu6ZaD2+aK9+inIjIEIi4S PMOVpVzZLf9bT0gkXzhB78BtoCcPg2MsMD7/eC+XqXc5pP+STy7FRyqP+oE0IRMjqFn6K133DDj DijB2kYc795SkKQ== X-Received: from aliceryhl2.c.googlers.com ([fda3:e722:ac3:cc00:68:949d:c0a8:572]) (user=aliceryhl job=sendgmr) by 2002:a81:a009:0:b0:608:d045:6eff with SMTP id x9-20020a81a009000000b00608d0456effmr1615216ywg.2.1708940673405; Mon, 26 Feb 2024 01:44:33 -0800 (PST) Date: Mon, 26 Feb 2024 09:44:02 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAGFd3GUC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIxMDIyMz3dz8lNKcVN3EYt2CkiJdAwtjA4MkCwtTI9MkJaCegqLUtMwKsHn RsbW1ANB6U9lfAAAA X-Developer-Key: i=aliceryhl@google.com; a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1521; i=aliceryhl@google.com; h=from:subject:message-id; bh=vDAziiFfJZc6buVlmJCiloA6pDClgVZnZEp0wK9gzmU=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBl3F14z1zT8Nox+NGVYCm9mWk5R/j0ItPWvC0AO PkkLM66XLOJAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCZdxdeAAKCRAEWL7uWMY5 RvcQD/4769UrmJrYdzfhNSdrDtcuLUwxigXofYKTy1I/Dv87ftNHha5Xggz8u3XXuCOjo9yMMhn XOqooM6hQbGB95H8P+/1Fv2t78IkYX9i19/58+JtDv80wOfbMS+qRRwYVH5wyJT6Mh8g8KaX8DK X+3Hg+tXp1ayWfjHwKv+fy2gZVslZ5/2KEnBxj61RKp2Vy3KjoalXU98BEl5K+ew6nyzXA9KvRO ct2LttNAWVlKZNbegSoQViA+CrFBCQJMqgnsSQg5NfT8p/fVonNG1edmWjUhQfc+Zfy0MDhe6ak rxBg2Kfz2pyz/IkRt0gkge0G2/nTN54c1AtUOhfhBQxHPJlzWNnSVRIKPgLvad4ABLrzhLMLLjv mRTVNGDH8iKXxlLPfEBL+/9M21Bu1Cfs/APckzegcwhNVCIfe8XA2kY3l+HrIpZ2npbd/5SBYpo MWNcwF+UYrxNQflP/eE5hTyGcPwtFSKlq/IIb4kfchpyHEqvkXqiNjeD8kEaS2pe/Nt4PFPnZsu bVIMI/ClQCHUJJ6qfnCvdT3jDxszhdfQTZA7IdU7xeFlvC+ejsYLRmkM8Rv9pQ56MlPeT/qtDQH YHS3Xb586j7fcGqsvDvKTTeQGxK+T76D+QQL7mTOORHZJ6HBnc/0SEi79+tKBN6l9gkB8nXe4iP XsBtj6ddtoYVpcg== X-Mailer: b4 0.13-dev-26615 Message-ID: <20240226-module-as-ptr-v1-1-83bc89213113@google.com> Subject: [PATCH] rust: add `Module::as_ptr` From: Alice Ryhl To: Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Boqun Feng , Gary Guo , " =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= " , Benno Lossin , Andreas Hindborg Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Alice Ryhl X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791955654674102497 X-GMAIL-MSGID: 1791955654674102497 This allows you to get a raw pointer to THIS_MODULE for use in unsafe code. The Rust Binder RFC uses it when defining fops for the binderfs component [1]. This doesn't really need to go in now - it could go in together with Rust Binder like how it is sent in the Rust Binder RFC. However, the upcoming 1.77.0 release of the Rust compiler introduces a new warning, and applying this patch now will silence that warning. That allows us to avoid adding the #[allow(dead_code)] annotation seen in [2]. Link: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-2-08ba9197f637@google.com/ [1] Link: https://lore.kernel.org/all/20240217002717.57507-1-ojeda@kernel.org/ [2] Signed-off-by: Alice Ryhl --- rust/kernel/lib.rs | 7 +++++++ 1 file changed, 7 insertions(+) --- base-commit: e944171070b65521c0513c01c56174ec8fd7d249 change-id: 20240226-module-as-ptr-08300b88525b Best regards, diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index be68d5e567b1..1952a0df0a15 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -92,6 +92,13 @@ impl ThisModule { pub const unsafe fn from_ptr(ptr: *mut bindings::module) -> ThisModule { ThisModule(ptr) } + + /// Access the raw pointer for this module. + /// + /// It is up to the user to use it correctly. + pub const fn as_ptr(&self) -> *mut bindings::module { + self.0 + } } #[cfg(not(any(testlib, test)))]