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=ham 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 0C067C4338F for ; Fri, 20 Aug 2021 18:19:37 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B488061268 for ; Fri, 20 Aug 2021 18:19:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B488061268 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 180558D0010; Fri, 20 Aug 2021 14:18:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0F6AB8D0013; Fri, 20 Aug 2021 14:18:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CFBC98D0010; Fri, 20 Aug 2021 14:18:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0078.hostedemail.com [216.40.44.78]) by kanga.kvack.org (Postfix) with ESMTP id B088D8D0011 for ; Fri, 20 Aug 2021 14:18:54 -0400 (EDT) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 5DAC48081919 for ; Fri, 20 Aug 2021 18:18:54 +0000 (UTC) X-FDA: 78496270188.20.61D2C17 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by imf20.hostedemail.com (Postfix) with ESMTP id B46D1D0000B0 for ; Fri, 20 Aug 2021 18:18:53 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10082"; a="197075218" X-IronPort-AV: E=Sophos;i="5.84,338,1620716400"; d="scan'208";a="197075218" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga107.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 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: B46D1D0000B0 X-Stat-Signature: t7ncde6op78t69rfgcbuztubrh7kc31m Authentication-Results: imf20.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=intel.com (policy=none); spf=none (imf20.hostedemail.com: domain of yu-cheng.yu@intel.com has no SPF policy when checking 192.55.52.151) smtp.mailfrom=yu-cheng.yu@intel.com X-HE-Tag: 1629483533-388367 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The single call site of copy_thread() passes stack size in 'arg'. To mak= e 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, unsigne= d long tls) return do_set_thread_area_64(p, ARCH_SET_FS, tls); } =20 -int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned lo= ng 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 l= ong sp, unsigned long arg, if (unlikely(p->flags & PF_KTHREAD)) { p->thread.pkru =3D 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; } =20 @@ -191,7 +192,7 @@ int copy_thread(unsigned long clone_flags, unsigned l= ong sp, unsigned long arg, */ childregs->sp =3D 0; childregs->ip =3D 0; - kthread_frame_init(frame, sp, arg); + kthread_frame_init(frame, sp, stack_size); return 0; } =20 --=20 2.21.0