From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f176.google.com (mail-qk1-f176.google.com [209.85.222.176]) (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 A6A78433D9; Mon, 3 Feb 2025 23:45:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738626330; cv=none; b=dfpryRT9I0PWoMI9NovoSO+c1MNzovdp37FbMZcrNbYwI2mdyIK2V7YwaeVAjxS259Wfkn3ZqrMNzmG1K2OSm+/9ziKkOS+ex2x2hj1Jg5KS1RhJqoInPdj4Bb1Y4eeiSGb7zXpAsj54v6DU5BOGWu89tIuJzLGjE5AlPCrxoBQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738626330; c=relaxed/simple; bh=3wKrqRvoocBqjwP8WrQ5sMESJ+CSaXEYKVKnpBllifo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MXw28xknKrWdu99HViBi8Gww83HfwzveJhPUHoardDmmgXptdxcUZBD7snFuTeUewa9XAxAmNm05teK1PZ/6kn5RTFUp9FW6E/DZ3DK0EWus5xgPIXcs9vtPPDWJBAlR43MaEY88i4hTeYCC1+WEeMhZrYQe4zYlWP/ipxc/nFM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=bBTg+ejq; arc=none smtp.client-ip=209.85.222.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bBTg+ejq" Received: by mail-qk1-f176.google.com with SMTP id af79cd13be357-7be44a90468so599753985a.3; Mon, 03 Feb 2025 15:45:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738626327; x=1739231127; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :feedback-id:from:to:cc:subject:date:message-id:reply-to; bh=9pAAnPDlS62UKmzPQ021WPzDQ16evuT6BnLhtrMFzBk=; b=bBTg+ejqpvW8aPjU+q4KtucMqR19m8Jo2neeXMUsUnGf0C0IcxXolnrfkddaYXF94F rgR8kT3R7/5Zvms8G2PNRXHX0yAoBwox6hdLKnvuMsHnhGfgcxdqDLcy1sXBRuxC+M5c uNJLCcLeVKe5ggc+QtyK/GNvjLEvuWDDbwoc6LpiOccbw/UcT6fA3Y7Ql4DVVagjdhsM yY/FrURwXpd8s1d4Tv3vh7fv4aLDNmHfs2ltUjm5EwITUbU+X72zYVp19yWl16VTPTMc /fjAT8gPYkdIeRWm44fELmpn+ZbtzIapA6MmxlIsyBl+onJLxRHkY3gg84JLu5ktxLdD KTvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738626327; x=1739231127; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :feedback-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=9pAAnPDlS62UKmzPQ021WPzDQ16evuT6BnLhtrMFzBk=; b=GiYQIB9+trfBypPsNi5CIdNUcpYsIlCcZIa0yLVQuzf7ZvDp609R7VUi/rZaimr+Iz KT8l62DLnUbT/DFnjyMEr8bI49OoiZUaXXOJKQC43gGjhlqSwX/Z+aemj6875Ie5f6EL xB2ZjF6ffZpxsOq6C5MZ8rnNKabFcTv2RYa1TFE3/15IZpTAkaA8/7wfsy5fcLWFe1Sz 8TpLFiNYE6ZYkAlZ08Yp65KIB2kwPxCTUtQ5RiPDaZW8As3JsiNfobKSAJchNV4bDzzt MayGWXsknWRkcCp8YPlddtERa5czilsB45GV1u2hXuLdDhSAbBzF5v0iCKZ/UG/PakPV GIqg== X-Forwarded-Encrypted: i=1; AJvYcCU84Y1yaE7QvQW4s3wh7819gAIeuL8j8XGLnuXutwKp2W+KhmrzanM6AEG4wGO4EfeamlOC3IZr8WsA7Ks=@vger.kernel.org, AJvYcCWDhXtcUpJDj9nAVg4Jr++gKWTY39uJQJjVjNAOapsfjJxIE31OFZY59CzDIUQpzB6WtOprjVgI+/e4nwRHq98=@vger.kernel.org X-Gm-Message-State: AOJu0YzLsCO2Kj3ThLKXPg3F1xJZj92EiwcRZU4k0bfHdmc0BnWWyKyF Fo7M0DXiyJgO8FkeUsicPbB6G0aY2RjVfTsrbNqE/JZ4AgnwQcsn X-Gm-Gg: ASbGncsLZzTWIWX1octv+qhLvdzW4M8h9abyWHZgKtvE+T1b8xT0zApZhEgbr4r+Xvs 5FY/03331zD7BBCj/8eNgrJt2TJhZqJ5Kzodl36ceLLeMJgB1gFgENYlkcqA92D9Ozbnca55ykw KfZBhIhqSMAFCqtHlZiyqO+/xSDIN65ZctXupdKZ4nFecSAL9gkBlAFxmLsF1/OkaIHukjDYkoz 8A4JNIJ+cF7cdLLAjxWCuu0q/6pppFz2KGaPT8UB6Xk/FHlAuJHclp5p8TciUcAtySqF+eXOgj+ t1xnV0yCrb/c2tSS4+bvxIwyeOU2cMxFvjBHmr6Tdw6Yr2c3B5FIKgzM2FhA5gyj+0c+jtMzegY harcM6Q== X-Google-Smtp-Source: AGHT+IEhI5jdiUGgFQ8ftpLWBjIUt2c9hPn1+UeZdd0LhFet/EfBYioPIkGij+rG9nrsjWdg6h23bw== X-Received: by 2002:a05:620a:2889:b0:7b7:106a:19b2 with SMTP id af79cd13be357-7bffcce86d3mr3673963985a.23.1738626327367; Mon, 03 Feb 2025 15:45:27 -0800 (PST) Received: from fauth-a1-smtp.messagingengine.com (fauth-a1-smtp.messagingengine.com. [103.168.172.200]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c00a90d14asm579609785a.104.2025.02.03.15.45.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 15:45:26 -0800 (PST) Received: from phl-compute-01.internal (phl-compute-01.phl.internal [10.202.2.41]) by mailfauth.phl.internal (Postfix) with ESMTP id 1A8C0120007B; Mon, 3 Feb 2025 18:45:26 -0500 (EST) Received: from phl-mailfrontend-02 ([10.202.2.163]) by phl-compute-01.internal (MEProxy); Mon, 03 Feb 2025 18:45:26 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddukeelkecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpggftfghnshhusghstghrihgsvgdp uffrtefokffrpgfnqfghnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivg hnthhsucdlqddutddtmdenucfjughrpeffhffvvefukfhfgggtugfgjgesthekredttddt jeenucfhrhhomhepuehoqhhunhcuhfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrih hlrdgtohhmqeenucggtffrrghtthgvrhhnpeevgffhueevkedutefgveduuedujeefledt hffgheegkeekiefgudekhffggeelfeenucevlhhushhtvghrufhiiigvpedtnecurfgrrh grmhepmhgrihhlfhhrohhmpegsohhquhhnodhmvghsmhhtphgruhhthhhpvghrshhonhgr lhhithihqdeiledvgeehtdeigedqudejjeekheehhedvqdgsohhquhhnrdhfvghngheppe hgmhgrihhlrdgtohhmsehfihigmhgvrdhnrghmvgdpnhgspghrtghpthhtohepvddtpdhm ohguvgepshhmthhpohhuthdprhgtphhtthhopehtrghmihhrugesghhmrghilhdrtghomh dprhgtphhtthhopegrrdhhihhnuggsohhrgheskhgvrhhnvghlrdhorhhgpdhrtghpthht ohepohhjvggurgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghnnhgrqdhmrghrih grsehlihhnuhhtrhhonhhigidruggvpdhrtghpthhtohepfhhrvgguvghrihgtsehkvghr nhgvlhdrohhrghdprhgtphhtthhopehtghhlgieslhhinhhuthhrohhnihigrdguvgdprh gtphhtthhopegurghkrheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghlvgigrdhg rgihnhhorhesghhmrghilhdrtghomhdprhgtphhtthhopehgrghrhiesghgrrhihghhuoh drnhgvth X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 3 Feb 2025 18:45:25 -0500 (EST) Date: Mon, 3 Feb 2025 15:44:25 -0800 From: Boqun Feng To: Tamir Duberstein Cc: Andreas Hindborg , Miguel Ojeda , Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner , Danilo Krummrich , Alex Gaynor , Gary Guo , =?iso-8859-1?Q?Bj=F6rn?= Roy Baron , Benno Lossin , Alice Ryhl , Trevor Gross , Lyude Paul , Guangbo Cui <2407018371@qq.com>, Dirk Behme , Daniel Almeida , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 03/14] rust: sync: add `Arc::as_ptr` Message-ID: References: <20250110-hrtimer-v3-v6-12-rc2-v6-0-f71d50f16482@kernel.org> <20250110-hrtimer-v3-v6-12-rc2-v6-3-f71d50f16482@kernel.org> <3zUeHP9VQ7ZaBieXue_fQ_8V8tcTW1nc83OQA7ehwV7itvlpzwF5DHHmyqTU70UzpXhUKWoDtueUb2fsFQdyUA==@protonmail.internalid> <8734hid0qh.fsf@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Mon, Feb 03, 2025 at 05:46:42PM -0500, Tamir Duberstein wrote: > On Thu, Jan 16, 2025 at 2:23 PM Andreas Hindborg wrote: > > > > "Tamir Duberstein" writes: > > > > > On Fri, Jan 10, 2025 at 3:19 PM Andreas Hindborg wrote: > > >> > > >> Add a method to get a pointer to the data contained in an `Arc`. > > >> > > >> Signed-off-by: Andreas Hindborg > > > > > > Can this mention why it is needed? > > > > I can add that after the cut. It is for impleminting `HrTimerPointer` > > for `Arc`. > > The broader question is: why do we need to implement `/HrTimerPointer > ` for `Arc`? Even broader is: why do we need to use raw pointers so > much? Because to use the C function for hrtimer operation (start, cancel, etc.), we need to pass a raw pointer of "struct hrtimer", which is embedded in the object in an `Arc`. Regards, Boqun