From: Helge Deller Subject: [PATCH] parisc: Avoid stalled CPU warnings after system shutdown Date: Wed, 29 Mar 2017 08:25:30 +0200 Message-ID: <20170329062530.GA2960@ls3530.fritz.box> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: linux-parisc@vger.kernel.org, James Bottomley , John David Anglin Return-path: List-ID: List-Id: linux-parisc.vger.kernel.org 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 Cc: stable@vger.kernel.org # 4.9+ diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index b76f503..4516a5b 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -143,6 +143,8 @@ 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 (;;); }