| From 476e75a44b56038bee9207242d4bc718f6b4de06 Mon Sep 17 00:00:00 2001 |
| From: Helge Deller <deller@gmx.de> |
| Date: Wed, 29 Mar 2017 08:25:30 +0200 |
| Subject: [PATCH] parisc: Avoid stalled CPU warnings after system shutdown |
| |
| 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 <deller@gmx.de> |
| Cc: stable@vger.kernel.org # 4.9+ |
| |
| diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c |
| index b76f503eee4a..4516a5b53f38 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 (;;); |
| } |
| |
| -- |
| 2.12.0 |
| |