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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 524B5C433DF for ; Wed, 27 May 2020 07:31:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D50A207D3 for ; Wed, 27 May 2020 07:31:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387514AbgE0Hbf (ORCPT ); Wed, 27 May 2020 03:31:35 -0400 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]:42166 "EHLO out30-131.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728888AbgE0Hbe (ORCPT ); Wed, 27 May 2020 03:31:34 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R951e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01355;MF=laijs@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0TzmtQ-6_1590564679; Received: from localhost(mailfrom:laijs@linux.alibaba.com fp:SMTPD_---0TzmtQ-6_1590564679) by smtp.aliyun-inc.com(127.0.0.1); Wed, 27 May 2020 15:31:20 +0800 From: Lai Jiangshan To: linux-kernel@vger.kernel.org Cc: Lai Jiangshan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Andy Lutomirski , Alexandre Chartre , Peter Zijlstra , Zhenzhong Duan , "Eric W. Biederman" , Jann Horn , Dave Hansen Subject: [PATCH 4/5] x86/entry: remove unused sync_regs() Date: Wed, 27 May 2020 07:31:06 +0000 Message-Id: <20200527073107.2127-5-laijs@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200527073107.2127-1-laijs@linux.alibaba.com> References: <20200527073107.2127-1-laijs@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org No more users. Signed-off-by: Lai Jiangshan --- arch/x86/include/asm/traps.h | 1 - arch/x86/kernel/traps.c | 13 ------------- 2 files changed, 14 deletions(-) diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index f5a2e438a878..20b9db7a1d49 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -21,7 +21,6 @@ asmlinkage void xen_page_fault(void); dotraplinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address); #ifdef CONFIG_X86_64 -asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs); asmlinkage __visible notrace struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s); void __init trap_init(void); diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 3bef95934644..8291f84933ff 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -642,19 +642,6 @@ DEFINE_IDTENTRY_RAW(exc_int3) } #ifdef CONFIG_X86_64 -/* - * Help handler running on a per-cpu (IST or entry trampoline) stack - * to switch to the normal thread stack if the interrupted code was in - * user mode. The actual stack switch is done in entry_64.S - */ -asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *eregs) -{ - struct pt_regs *regs = (struct pt_regs *)this_cpu_read(cpu_current_top_of_stack) - 1; - if (regs != eregs) - *regs = *eregs; - return regs; -} - struct bad_iret_stack { void *error_entry_ret; struct pt_regs regs; -- 2.20.1