From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755586AbbCSBgL (ORCPT ); Wed, 18 Mar 2015 21:36:11 -0400 Received: from mail.kernel.org ([198.145.29.136]:52184 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750782AbbCSBdj (ORCPT ); Wed, 18 Mar 2015 21:33:39 -0400 From: Andy Lutomirski To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Brad Spengler , Denys Vlasenko , Andy Lutomirski Subject: [PATCH 1/9] x86, fault: Use TASK_SIZE_MAX in is_prefetch Date: Wed, 18 Mar 2015 18:33:27 -0700 Message-Id: <09156b63bad90a327827003c9e53faa82ef4c56e.1426728647.git.luto@kernel.org> X-Mailer: git-send-email 2.3.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is slightly shorter and slightly faster. It's also more correct: the split between user and kernel addresses is TASK_SIZE_MAX regardless of ti->flags. Signed-off-by: Andy Lutomirski --- arch/x86/mm/fault.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index ede025fb46f1..ae340d3761ca 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -148,7 +148,7 @@ is_prefetch(struct pt_regs *regs, unsigned long error_code, unsigned long addr) instr = (void *)convert_ip_to_linear(current, regs); max_instr = instr + 15; - if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE) + if (user_mode(regs) && instr >= (unsigned char *)TASK_SIZE_MAX) return 0; while (instr < max_instr) { -- 2.3.0