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| author | Toshi Kani <toshi.kani@hp.com> | 2013-08-30 02:22:06 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-09-25 10:38:09 +0200 |
| commit | f6913f990273a1fbfc0ec501d4998faa4f1ebae6 (patch) | |
| tree | 2f184030b3c2ea5949da5f622a5a81933e4cd8d2 /arch/x86/kernel/topology.c | |
| parent | Linux 3.12-rc2 (diff) | |
| download | linux-f6913f990273a1fbfc0ec501d4998faa4f1ebae6.tar.xz linux-f6913f990273a1fbfc0ec501d4998faa4f1ebae6.zip | |
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 <toshi.kani@hp.com>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/x86/kernel/topology.c')
| -rw-r--r-- | arch/x86/kernel/topology.c | 7 |
1 files 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; |