From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262706AbVG2S6s (ORCPT ); Fri, 29 Jul 2005 14:58:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262704AbVG2S4d (ORCPT ); Fri, 29 Jul 2005 14:56:33 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:33417 "EHLO ebiederm.dsl.xmission.com") by vger.kernel.org with ESMTP id S262680AbVG2SyL (ORCPT ); Fri, 29 Jul 2005 14:54:11 -0400 To: Andi Kleen Cc: , Andrew Morton Subject: [PATCH] x86_64: Fix off by one in e820_mapped From: ebiederm@xmission.com (Eric W. Biederman) Date: Fri, 29 Jul 2005 12:53:56 -0600 Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This allows a valid iommu placed immediately after memory to work, to be recognized as after the last byte of memory and not overlapping it. Signed-off-by: Eric W. Biederman --- arch/x86_64/kernel/e820.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) a0929b87b8d0d059a10eb3e61da3d679d64980e1 diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -85,7 +85,7 @@ int __init e820_mapped(unsigned long sta struct e820entry *ei = &e820.map[i]; if (type && ei->type != type) continue; - if (ei->addr >= end || ei->addr + ei->size < start) + if (ei->addr >= end || ei->addr + ei->size <= start) continue; return 1; }