From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932675AbWHJUEO (ORCPT ); Thu, 10 Aug 2006 16:04:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932474AbWHJUD5 (ORCPT ); Thu, 10 Aug 2006 16:03:57 -0400 Received: from ns2.suse.de ([195.135.220.15]:60651 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S932639AbWHJTgp (ORCPT ); Thu, 10 Aug 2006 15:36:45 -0400 From: Andi Kleen References: <20060810 935.775038000@suse.de> In-Reply-To: <20060810 935.775038000@suse.de> Subject: [PATCH for review] [87/145] x86_64: remove lock prefix from is_at_popf() tests Message-Id: <20060810193644.54A7A13C0B@wotan.suse.de> Date: Thu, 10 Aug 2006 21:36:44 +0200 (CEST) To: undisclosed-recipients:; Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org r From: Chuck Ebbert <76306.1226@compuserve.com> The lock prefix will cause an exception when used with the popf instruction, so no need to continue searching after it's found. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andi Kleen --- arch/x86_64/kernel/ptrace.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) Index: linux/arch/x86_64/kernel/ptrace.c =================================================================== --- linux.orig/arch/x86_64/kernel/ptrace.c +++ linux/arch/x86_64/kernel/ptrace.c @@ -138,7 +138,7 @@ static int is_at_popf(struct task_struct case 0x26: case 0x2e: case 0x36: case 0x3e: case 0x64: case 0x65: - case 0xf0: case 0xf2: case 0xf3: + case 0xf2: case 0xf3: continue; case 0x40 ... 0x4f: @@ -148,7 +148,7 @@ static int is_at_popf(struct task_struct /* 64-bit mode: REX prefix */ continue; - /* CHECKME: f0, f2, f3 */ + /* CHECKME: f2, f3 */ /* * pushf: NOTE! We should probably not let