| From aa8faf4566562b176bdbec4ad449426f266eec75 Mon Sep 17 00:00:00 2001 |
| From: Huacai Chen <chenhc@lemote.com> |
| Date: Thu, 16 Jul 2020 18:40:23 +0800 |
| Subject: [PATCH] MIPS: CPU#0 is not hotpluggable |
| |
| commit 9cce844abf07b683cff5f0273977d5f8d0af94c7 upstream. |
| |
| Now CPU#0 is not hotpluggable on MIPS, so prevent to create /sys/devices |
| /system/cpu/cpu0/online which confuses some user-space tools. |
| |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Huacai Chen <chenhc@lemote.com> |
| Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/arch/mips/kernel/topology.c b/arch/mips/kernel/topology.c |
| index cd3e1f82e1a5..08ad6371fbe0 100644 |
| --- a/arch/mips/kernel/topology.c |
| +++ b/arch/mips/kernel/topology.c |
| @@ -20,7 +20,7 @@ static int __init topology_init(void) |
| for_each_present_cpu(i) { |
| struct cpu *c = &per_cpu(cpu_devices, i); |
| |
| - c->hotpluggable = 1; |
| + c->hotpluggable = !!i; |
| ret = register_cpu(c, i); |
| if (ret) |
| printk(KERN_WARNING "topology_init: register_cpu %d " |
| -- |
| 2.27.0 |
| |
