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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 98051ECE562 for ; Tue, 18 Sep 2018 00:12:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D2BE21502 for ; Tue, 18 Sep 2018 00:12:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4D2BE21502 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xmission.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728957AbeIRFm2 (ORCPT ); Tue, 18 Sep 2018 01:42:28 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:53114 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726526AbeIRFm2 (ORCPT ); Tue, 18 Sep 2018 01:42:28 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out02.mta.xmission.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.87) (envelope-from ) id 1g23dB-0007Fd-QZ; Mon, 17 Sep 2018 18:12:41 -0600 Received: from [105.184.227.67] (helo=x220.Home) by in02.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA256:128) (Exim 4.87) (envelope-from ) id 1g23Zj-0002Qk-UX; Mon, 17 Sep 2018 18:09:08 -0600 From: "Eric W. Biederman" To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, Thomas Gleixner , Ingo Molnar , x86@kernel.org, "Eric W. Biederman" Date: Tue, 18 Sep 2018 02:05:45 +0200 Message-Id: <20180918000546.12552-19-ebiederm@xmission.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <87y3bzk6yv.fsf@xmission.com> References: <87y3bzk6yv.fsf@xmission.com> X-XM-SPF: eid=1g23Zj-0002Qk-UX;;;mid=<20180918000546.12552-19-ebiederm@xmission.com>;;;hst=in02.mta.xmission.com;;;ip=105.184.227.67;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX18P2EJgSMAdSO55NTiPJercMP+DgBLmKpU= X-SA-Exim-Connect-IP: 105.184.227.67 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: [REVIEW][PATCH 19/20] signal/x86: Pass pkey by value X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that si_code == SEGV_PKUERR is the flag indicating that a pkey is present there is no longer a need to pass a pointer to a local pkey value, instead pkey can be passed more efficiently by value. Signed-off-by: "Eric W. Biederman" --- arch/x86/mm/fault.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 548396aa03e1..c09a0c2fa614 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -769,7 +769,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code, static void __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, - unsigned long address, u32 *pkey, int si_code) + unsigned long address, u32 pkey, int si_code) { struct task_struct *tsk = current; @@ -818,7 +818,7 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, tsk->thread.trap_nr = X86_TRAP_PF; if (si_code == SEGV_PKUERR) - force_sig_pkuerr((void __user *)address, *pkey); + force_sig_pkuerr((void __user *)address, pkey); force_sig_fault(SIGSEGV, si_code, (void __user *)address, tsk); @@ -835,12 +835,12 @@ static noinline void bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, unsigned long address) { - __bad_area_nosemaphore(regs, error_code, address, NULL, SEGV_MAPERR); + __bad_area_nosemaphore(regs, error_code, address, 0, SEGV_MAPERR); } static void __bad_area(struct pt_regs *regs, unsigned long error_code, - unsigned long address, u32 *pkey, int si_code) + unsigned long address, u32 pkey, int si_code) { struct mm_struct *mm = current->mm; /* @@ -855,7 +855,7 @@ __bad_area(struct pt_regs *regs, unsigned long error_code, static noinline void bad_area(struct pt_regs *regs, unsigned long error_code, unsigned long address) { - __bad_area(regs, error_code, address, NULL, SEGV_MAPERR); + __bad_area(regs, error_code, address, 0, SEGV_MAPERR); } static inline bool bad_area_access_from_pkeys(unsigned long error_code, @@ -906,10 +906,10 @@ bad_area_access_error(struct pt_regs *regs, unsigned long error_code, * faulted on a pte with its pkey=4. */ u32 pkey = vma_pkey(vma); - __bad_area(regs, error_code, address, &pkey, SEGV_PKUERR); + __bad_area(regs, error_code, address, pkey, SEGV_PKUERR); } else - __bad_area(regs, error_code, address, NULL, SEGV_ACCERR); + __bad_area(regs, error_code, address, 0, SEGV_ACCERR); } static void -- 2.17.1