Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756643AbdDFI6T (ORCPT ); Thu, 6 Apr 2017 04:58:19 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53908 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756040AbdDFIqH (ORCPT ); Thu, 6 Apr 2017 04:46:07 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Helge Deller Subject: [PATCH 4.10 50/81] parisc: Avoid stalled CPU warnings after system shutdown Date: Thu, 6 Apr 2017 10:38:42 +0200 Message-Id: <20170406083626.346730111@linuxfoundation.org> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20170406083624.322941631@linuxfoundation.org> References: <20170406083624.322941631@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1067 Lines: 33 4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Helge Deller commit 476e75a44b56038bee9207242d4bc718f6b4de06 upstream. Commit 73580dac7618 ("parisc: Fix system shutdown halt") introduced an endless loop for systems which don't provide a software power off function. But the soft lockup detector will detect this and report stalled CPUs after some time. Avoid those unwanted warnings by disabling the soft lockup detector. Fixes: 73580dac7618 ("parisc: Fix system shutdown halt") Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- arch/parisc/kernel/process.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -140,6 +140,8 @@ void machine_power_off(void) printk(KERN_EMERG "System shut down completed.\n" "Please power this system off now."); + /* prevent soft lockup/stalled CPU messages for endless loop. */ + rcu_sysrq_start(); for (;;); }