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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-28 00:12:41 (GMT) |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-28 00:12:41 (GMT) |
commit | 5c2aae8355f7ec1341d5c473c500a77bbfa7f701 (patch) | |
tree | bdb6059fbc1b476c36e7cda433fc4db64c627407 /drivers/base | |
parent | 3fbc4d63744b21ed6814ce768672531500bd3f14 (diff) | |
parent | 16ff816d3b5d2b81fcff5ca44eb9a98ac3b604b4 (diff) | |
download | linux-5c2aae8355f7ec1341d5c473c500a77bbfa7f701.tar.xz |
Merge branch 'acpi-hotplug'
* acpi-hotplug:
ACPI / memhotplug: Use defined marco METHOD_NAME__STA
ACPI / hotplug: Use kobject_init_and_add() instead of _init() and _add()
ACPI / hotplug: Don't set kobject parent pointer explicitly
ACPI / hotplug: Set kobject name via kobject_add(), not kobject_set_name()
hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()
hotplug / x86: Disable ARCH_CPU_PROBE_RELEASE on x86
hotplug / x86: Add hotplug lock to missing places
hotplug / x86: Fix online state in cpu0 debug interface
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/cpu.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 848ebbd..f48370d 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -44,13 +44,11 @@ static int __ref cpu_subsys_online(struct device *dev) struct cpu *cpu = container_of(dev, struct cpu, dev); int cpuid = dev->id; int from_nid, to_nid; - int ret = -ENODEV; - - cpu_hotplug_driver_lock(); + int ret; from_nid = cpu_to_node(cpuid); if (from_nid == NUMA_NO_NODE) - goto out; + return -ENODEV; ret = cpu_up(cpuid); /* @@ -61,19 +59,12 @@ static int __ref cpu_subsys_online(struct device *dev) if (from_nid != to_nid) change_cpu_under_node(cpu, from_nid, to_nid); - out: - cpu_hotplug_driver_unlock(); return ret; } static int cpu_subsys_offline(struct device *dev) { - int ret; - - cpu_hotplug_driver_lock(); - ret = cpu_down(dev->id); - cpu_hotplug_driver_unlock(); - return ret; + return cpu_down(dev->id); } void unregister_cpu(struct cpu *cpu) @@ -93,7 +84,17 @@ static ssize_t cpu_probe_store(struct device *dev, const char *buf, size_t count) { - return arch_cpu_probe(buf, count); + ssize_t cnt; + int ret; + + ret = lock_device_hotplug_sysfs(); + if (ret) + return ret; + + cnt = arch_cpu_probe(buf, count); + + unlock_device_hotplug(); + return cnt; } static ssize_t cpu_release_store(struct device *dev, @@ -101,7 +102,17 @@ static ssize_t cpu_release_store(struct device *dev, const char *buf, size_t count) { - return arch_cpu_release(buf, count); + ssize_t cnt; + int ret; + + ret = lock_device_hotplug_sysfs(); + if (ret) + return ret; + + cnt = arch_cpu_release(buf, count); + + unlock_device_hotplug(); + return cnt; } static DEVICE_ATTR(probe, S_IWUSR, NULL, cpu_probe_store); |