Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...

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

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 499b003f92782dfc8259791d6f13b4a377f24f5b..2c76afff3b15060e723fcec52569e450a3c46265 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -102,6 +102,51 @@ static ssize_t show_crash_notes(struct sys_device *dev, char *buf)
 static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL);
 #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);                  \
+}                                                                      \
+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);
+
+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
@@ -147,6 +192,9 @@ int __init cpu_dev_init(void)
        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);