};
EXPORT_SYMBOL(cpu_sysdev_class);
-static struct sys_device *cpu_sys_devices[NR_CPUS];
+static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);
#ifdef CONFIG_HOTPLUG_CPU
-static ssize_t show_online(struct sys_device *dev, char *buf)
+static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr,
+ char *buf)
{
struct cpu *cpu = container_of(dev, struct cpu, sysdev);
return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id));
}
-static ssize_t __ref store_online(struct sys_device *dev, const char *buf,
- size_t count)
+static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr,
+ const char *buf, size_t count)
{
struct cpu *cpu = container_of(dev, struct cpu, sysdev);
ssize_t ret;
sysdev_remove_file(&cpu->sysdev, &attr_online);
sysdev_unregister(&cpu->sysdev);
- cpu_sys_devices[logical_cpu] = NULL;
+ per_cpu(cpu_sys_devices, logical_cpu) = NULL;
return;
}
#else /* ... !CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_KEXEC
#include <linux/kexec.h>
-static ssize_t show_crash_notes(struct sys_device *dev, char *buf)
+static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr,
+ char *buf)
{
struct cpu *cpu = container_of(dev, struct cpu, sysdev);
ssize_t rc;
#endif
/*
+ * Print cpu online, possible, present, and system maps
+ */
+static ssize_t print_cpus_map(char *buf, cpumask_t *map)
+{
+ int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *map);
+
+ buf[n++] = '\n';
+ buf[n] = '\0';
+ return n;
+}
+
+#define print_cpus_func(type) \
+static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \
+{ \
+ return print_cpus_map(buf, &cpu_##type##_map); \
+} \
+static struct sysdev_class_attribute attr_##type##_map = \
+ _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
+
+print_cpus_func(online);
+print_cpus_func(possible);
+print_cpus_func(present);
+
+static struct sysdev_class_attribute *cpu_state_attr[] = {
+ &attr_online_map,
+ &attr_possible_map,
+ &attr_present_map,
+};
+
+static int cpu_states_init(void)
+{
+ int i;
+ int err = 0;
+
+ for (i = 0; i < ARRAY_SIZE(cpu_state_attr); i++) {
+ int ret;
+ ret = sysdev_class_create_file(&cpu_sysdev_class,
+ cpu_state_attr[i]);
+ if (!err)
+ err = ret;
+ }
+ return err;
+}
+
+/*
* register_cpu - Setup a sysfs device for a CPU.
* @cpu - cpu->hotpluggable field set to 1 will generate a control file in
* sysfs for this CPU.
if (!error && cpu->hotpluggable)
register_cpu_control(cpu);
if (!error)
- cpu_sys_devices[num] = &cpu->sysdev;
+ per_cpu(cpu_sys_devices, num) = &cpu->sysdev;
if (!error)
register_cpu_under_node(num, cpu_to_node(num));
struct sys_device *get_cpu_sysdev(unsigned cpu)
{
- if (cpu < NR_CPUS)
- return cpu_sys_devices[cpu];
+ if (cpu < nr_cpu_ids && cpu_possible(cpu))
+ return per_cpu(cpu_sys_devices, cpu);
else
return NULL;
}
int err;
err = sysdev_class_register(&cpu_sysdev_class);
+ if (!err)
+ err = cpu_states_init();
+
#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
if (!err)
err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);