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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6BC3FCCD195 for ; Fri, 17 Oct 2025 15:44:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:Message-ID: In-Reply-To:Subject:cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=mD6GKQsICDFl23FLbN/g8xqNlYrRrDFI/uXZrkLF91o=; b=NqJqx8FO/9G8Tg YAmNcMtCS/D743qie9XimNzRdE8mr6+jZhAZt6vwMlnCVArK71xMfEJVpccLWWjuooqWook9L8Mgr nvOr3DH8V1XOo1J+JAhiXhOhvDvqM4BVaNvxrATBw0/jF9wj++WD7vKdMt/EMRhlgrzFGqusk15ZJ 7RuoQP2C7FS+se64IytgNVTvnV/kd5qeu4qFDlPptLKF9EAjH/B41Q6ybeCwb+jtY+1SkmffJMLuI mfc1Uc5VUcrhLg7IRZAO6nFFlCWg7aFuybcxH/6lPabFlBB8geATzpSaMg0Irqa4TQYU3IsKkkqK8 M6JzGUgKagfwo9JXJKUw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9mcE-00000008JFE-07U2; Fri, 17 Oct 2025 15:43:38 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzGuk-00000000VGJ-3M8a; Thu, 18 Sep 2025 15:51:19 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 3015643217; Thu, 18 Sep 2025 15:51:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D77DBC4CEE7; Thu, 18 Sep 2025 15:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758210677; bh=e6XJbeklgFNXwruDywAZe7vowNbZUbwBKpZS63m54og=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=lAxccBgHQJMGKL6W5XO/kIBHMi2AladIz8qPWx4MBG7gpBrzHZckIimBwgkALGSoK RTpLe7661eFC5B/7BhfypSLu8ciNLbjbhnW0/Uiw7F9qtuf/K/hOn+NGzmTK4Elius Puw/h1XtP570vHRTCm/o6CmMUjRekyChiJ42E7YZlGDJw6uFwLqKV4izLQfNVxc+1W 3GgwOdBMEpO6bPhXxyYgbuGAlwFII7VeYUA20OL3bsW1JzfLATB4CEE7Um16odYOB9 O8FOQqOy+9iE5VgV50GipK6qrDd5viCwdSnAqnhpyMVlV7VT8suWp23kcrZWa2l0BA qFbk69uCk7f8g== Date: Thu, 18 Sep 2025 09:51:07 -0600 (MDT) From: Paul Walmsley To: Simon Schuster cc: Dinh Nguyen , Christian Brauner , Arnd Bergmann , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Kees Cook , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Guo Ren , Oleg Nesterov , Jens Axboe , Alexander Viro , Jan Kara , Tejun Heo , Johannes Weiner , =?ISO-8859-15?Q?Michal_Koutn=FD?= , Paul Moore , Serge Hallyn , James Morris , "Serge E. Hallyn" , Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner , Masami Hiramatsu , "David S. 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Peter Anvin" , Chris Zankel , Max Filippov , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, linux-security-module@vger.kernel.org, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-perf-users@vger.kernel.org, apparmor@lists.ubuntu.com, selinux@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org Subject: Re: [PATCH v2 3/4] arch: copy_thread: pass clone_flags as u64 In-Reply-To: <20250901-nios2-implement-clone3-v2-3-53fcf5577d57@siemens-energy.com> Message-ID: References: <20250901-nios2-implement-clone3-v2-0-53fcf5577d57@siemens-energy.com> <20250901-nios2-implement-clone3-v2-3-53fcf5577d57@siemens-energy.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250918_085118_875407_B5D3F9DC X-CRM114-Status: GOOD ( 16.54 ) X-Mailman-Approved-At: Fri, 17 Oct 2025 08:43:37 -0700 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Mon, 1 Sep 2025, Simon Schuster via B4 Relay wrote: > From: Simon Schuster > > With the introduction of clone3 in commit 7f192e3cd316 ("fork: add > clone3") the effective bit width of clone_flags on all architectures was > increased from 32-bit to 64-bit, with a new type of u64 for the flags. > However, for most consumers of clone_flags the interface was not > changed from the previous type of unsigned long. > > While this works fine as long as none of the new 64-bit flag bits > (CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP) are evaluated, this is still > undesirable in terms of the principle of least surprise. > > Thus, this commit fixes all relevant interfaces of the copy_thread > function that is called from copy_process to consistently pass > clone_flags as u64, so that no truncation to 32-bit integers occurs on > 32-bit architectures. > > Signed-off-by: Simon Schuster Acked-by: Paul Walmsley # for RISC-V Thanks! - Paul _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv