From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934002AbbCDGWd (ORCPT ); Wed, 4 Mar 2015 01:22:33 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:44077 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933966AbbCDGW1 (ORCPT ); Wed, 4 Mar 2015 01:22:27 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniel Thompson , Jason Wessel Subject: [PATCH 3.19 136/175] kdb: Fix off by one error in kdb_cpu() Date: Tue, 3 Mar 2015 22:15:14 -0800 Message-Id: <20150304061048.446624845@linuxfoundation.org> X-Mailer: git-send-email 2.3.1 In-Reply-To: <20150304061026.134125919@linuxfoundation.org> References: <20150304061026.134125919@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jason Wessel commit df0036d117e6c9df36324e517728e33543065f9a upstream. There was a follow on replacement patch against the prior "kgdb: Timeout if secondary CPUs ignore the roundup". See: https://lkml.org/lkml/2015/1/7/442 This patch is the delta vs the patch that was committed upstream: * Fix an off-by-one error in kdb_cpu(). * Replace NR_CPUS with CONFIG_NR_CPUS to tell checkpatch that we really want a static limit. * Removed the "KGDB: " prefix from the pr_crit() in debug_core.c (kgdb-next contains a patch which introduced pr_fmt() to this file to the tag will now be applied automatically). Cc: Daniel Thompson Signed-off-by: Jason Wessel Signed-off-by: Greg Kroah-Hartman --- kernel/debug/debug_core.c | 2 +- kernel/debug/kdb/kdb_main.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -604,7 +604,7 @@ return_normal: online_cpus) cpu_relax(); if (!time_left) - pr_crit("KGDB: Timed out waiting for secondary CPUs.\n"); + pr_crit("Timed out waiting for secondary CPUs.\n"); /* * At this point the primary processor is completely --- a/kernel/debug/kdb/kdb_main.c +++ b/kernel/debug/kdb/kdb_main.c @@ -2256,7 +2256,7 @@ static int kdb_cpu(int argc, const char /* * Validate cpunum */ - if ((cpunum > NR_CPUS) || !kgdb_info[cpunum].enter_kgdb) + if ((cpunum >= CONFIG_NR_CPUS) || !kgdb_info[cpunum].enter_kgdb) return KDB_BADCPUNUM; dbg_switch_cpu = cpunum;