From f6913f990273a1fbfc0ec501d4998faa4f1ebae6 Mon Sep 17 00:00:00 2001 From: Toshi Kani Date: Thu, 29 Aug 2013 18:22:06 -0600 Subject: [PATCH] hotplug / x86: Fix online state in cpu0 debug interface _debug_hotplug_cpu() is a debug interface that puts cpu0 offline during boot-up when CONFIG_DEBUG_HOTPLUG_CPU0 is set. After cpu0 is put offline in this interface, however, /sys/devices/system/cpu/cpu0/online still shows 1 (online). This patch fixes _debug_hotplug_cpu() to update dev->offline when CPU online/offline operation succeeded. Signed-off-by: Toshi Kani Acked-by: Yasuaki Ishimatsu Signed-off-by: Rafael J. Wysocki --- arch/x86/kernel/topology.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c index 6e60b5fe2244..5823bbd668f4 100644 --- a/arch/x86/kernel/topology.c +++ b/arch/x86/kernel/topology.c @@ -72,16 +72,19 @@ int __ref _debug_hotplug_cpu(int cpu, int action) ret = cpu_down(cpu); if (!ret) { pr_info("CPU %u is now offline\n", cpu); + dev->offline = true; kobject_uevent(&dev->kobj, KOBJ_OFFLINE); } else pr_debug("Can't offline CPU%d.\n", cpu); break; case 1: ret = cpu_up(cpu); - if (!ret) + if (!ret) { + dev->offline = false; kobject_uevent(&dev->kobj, KOBJ_ONLINE); - else + } else { pr_debug("Can't online CPU%d.\n", cpu); + } break; default: ret = -EINVAL; -- 2.20.1