Merge git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6

[~andy/linux] / drivers / base / cpu.c

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index e62a4ccea54d0c4a3dc6dcd84eb107e557bcb54c..958bd1540c303d92f84cbcea016c7da4c0ce925c 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -35,6 +35,7 @@ static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribut
        struct cpu *cpu = container_of(dev, struct cpu, sysdev);
        ssize_t ret;
 
+       cpu_hotplug_driver_lock();
        switch (buf[0]) {
        case '0':
                ret = cpu_down(cpu->sysdev.id);
@@ -49,6 +50,7 @@ static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribut
        default:
                ret = -EINVAL;
        }
+       cpu_hotplug_driver_unlock();
 
        if (ret >= 0)
                ret = count;
@@ -72,6 +74,38 @@ void unregister_cpu(struct cpu *cpu)
        per_cpu(cpu_sys_devices, logical_cpu) = NULL;
        return;
 }
+
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+static ssize_t cpu_probe_store(struct class *class, const char *buf,
+                              size_t count)
+{
+       return arch_cpu_probe(buf, count);
+}
+
+static ssize_t cpu_release_store(struct class *class, const char *buf,
+                                size_t count)
+{
+       return arch_cpu_release(buf, count);
+}
+
+static CLASS_ATTR(probe, S_IWUSR, NULL, cpu_probe_store);
+static CLASS_ATTR(release, S_IWUSR, NULL, cpu_release_store);
+
+int __init cpu_probe_release_init(void)
+{
+       int rc;
+
+       rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
+                              &class_attr_probe.attr);
+       if (!rc)
+               rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
+                                      &class_attr_release.attr);
+
+       return rc;
+}
+device_initcall(cpu_probe_release_init);
+#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
+
 #else /* ... !CONFIG_HOTPLUG_CPU */
 static inline void register_cpu_control(struct cpu *cpu)
 {
@@ -97,7 +131,7 @@ static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute
         * boot up and this data does not change there after. Hence this
         * operation should be safe. No locking required.
         */
-       addr = __pa(per_cpu_ptr(crash_notes, cpunum));
+       addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum));
        rc = sprintf(buf, "%Lx\n", addr);
        return rc;
 }