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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D813C43216 for ; Fri, 20 Aug 2021 18:21:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 609CC60FDC for ; Fri, 20 Aug 2021 18:21:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238784AbhHTSWH (ORCPT ); Fri, 20 Aug 2021 14:22:07 -0400 Received: from mga05.intel.com ([192.55.52.43]:22429 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238325AbhHTSVa (ORCPT ); Fri, 20 Aug 2021 14:21:30 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10082"; a="302407837" X-IronPort-AV: E=Sophos;i="5.84,338,1620716400"; d="scan'208";a="302407837" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Aug 2021 11:18:51 -0700 X-IronPort-AV: E=Sophos;i="5.84,338,1620716400"; d="scan'208";a="533074764" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Aug 2021 11:18:51 -0700 From: Yu-cheng Yu To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Dave Martin , Weijiang Yang , Pengfei Xu , Haitao Huang , Rick P Edgecombe Cc: Yu-cheng Yu Subject: [PATCH v29 24/32] x86/process: Change copy_thread() argument 'arg' to 'stack_size' Date: Fri, 20 Aug 2021 11:11:53 -0700 Message-Id: <20210820181201.31490-25-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210820181201.31490-1-yu-cheng.yu@intel.com> References: <20210820181201.31490-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org The single call site of copy_thread() passes stack size in 'arg'. To make this clear and in preparation of using this argument for shadow stack allocation, change 'arg' to 'stack_size'. No functional changes. Signed-off-by: Yu-cheng Yu --- arch/x86/kernel/process.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 1d9463e3096b..e6e4d8bc9023 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -116,8 +116,9 @@ static int set_new_tls(struct task_struct *p, unsigned long tls) return do_set_thread_area_64(p, ARCH_SET_FS, tls); } -int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg, - struct task_struct *p, unsigned long tls) +int copy_thread(unsigned long clone_flags, unsigned long sp, + unsigned long stack_size, struct task_struct *p, + unsigned long tls) { struct inactive_task_frame *frame; struct fork_frame *fork_frame; @@ -158,7 +159,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg, if (unlikely(p->flags & PF_KTHREAD)) { p->thread.pkru = pkru_get_init_value(); memset(childregs, 0, sizeof(struct pt_regs)); - kthread_frame_init(frame, sp, arg); + kthread_frame_init(frame, sp, stack_size); return 0; } @@ -191,7 +192,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg, */ childregs->sp = 0; childregs->ip = 0; - kthread_frame_init(frame, sp, arg); + kthread_frame_init(frame, sp, stack_size); return 0; } -- 2.21.0