cpuset: limit the input of cpuset.sched_relax_domain_level

[linux-2.6] / kernel / power / main.c

diff --git a/kernel/power/main.c b/kernel/power/main.c
index 84e1ae63bb8c5aea8e020bb53ac95184c87a638f..6a6d5eb3524e7d2f219aeaa894e70981b3a706fb 100644 (file)
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -24,13 +24,35 @@
 
 #include "power.h"
 
-BLOCKING_NOTIFIER_HEAD(pm_chain_head);
-
 DEFINE_MUTEX(pm_mutex);
 
 unsigned int pm_flags;
 EXPORT_SYMBOL(pm_flags);
 
+#ifdef CONFIG_PM_SLEEP
+
+/* Routines for PM-transition notifications */
+
+static BLOCKING_NOTIFIER_HEAD(pm_chain_head);
+
+int register_pm_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_register(&pm_chain_head, nb);
+}
+EXPORT_SYMBOL_GPL(register_pm_notifier);
+
+int unregister_pm_notifier(struct notifier_block *nb)
+{
+       return blocking_notifier_chain_unregister(&pm_chain_head, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_pm_notifier);
+
+int pm_notifier_call_chain(unsigned long val)
+{
+       return (blocking_notifier_call_chain(&pm_chain_head, val, NULL)
+                       == NOTIFY_BAD) ? -EINVAL : 0;
+}
+
 #ifdef CONFIG_PM_DEBUG
 int pm_test_level = TEST_NONE;
 
@@ -53,7 +75,8 @@ static const char * const pm_tests[__TEST_AFTER_LAST] = {
        [TEST_FREEZER] = "freezer",
 };
 
-static ssize_t pm_test_show(struct kset *kset, char *buf)
+static ssize_t pm_test_show(struct kobject *kobj, struct kobj_attribute *attr,
+                               char *buf)
 {
        char *s = buf;
        int level;
@@ -73,7 +96,8 @@ static ssize_t pm_test_show(struct kset *kset, char *buf)
        return (s - buf);
 }
 
-static ssize_t pm_test_store(struct kset *kset, const char *buf, size_t n)
+static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr,
+                               const char *buf, size_t n)
 {
        const char * const *s;
        int level;
@@ -104,6 +128,8 @@ power_attr(pm_test);
 static inline int suspend_test(int level) { return 0; }
 #endif /* !CONFIG_PM_DEBUG */
 
+#endif /* CONFIG_PM_SLEEP */
+
 #ifdef CONFIG_SUSPEND
 
 /* This is just an arbitrary number */
@@ -149,13 +175,13 @@ static int suspend_prepare(void)
        if (!suspend_ops || !suspend_ops->enter)
                return -EPERM;
 
+       pm_prepare_console();
+
        error = pm_notifier_call_chain(PM_SUSPEND_PREPARE);
        if (error)
                goto Finish;
 
-       pm_prepare_console();
-
-       if (freeze_processes()) {
+       if (suspend_freeze_processes()) {
                error = -EAGAIN;
                goto Thaw;
        }
@@ -173,10 +199,10 @@ static int suspend_prepare(void)
                return 0;
 
  Thaw:
-       thaw_processes();
-       pm_restore_console();
+       suspend_thaw_processes();
  Finish:
        pm_notifier_call_chain(PM_POST_SUSPEND);
+       pm_restore_console();
        return error;
 }
 
@@ -206,7 +232,7 @@ static int suspend_enter(suspend_state_t state)
        BUG_ON(!irqs_disabled());
 
        if ((error = device_power_down(PMSG_SUSPEND))) {
-               printk(KERN_ERR "Some devices failed to power down\n");
+               printk(KERN_ERR "PM: Some devices failed to power down\n");
                goto Done;
        }
 
@@ -221,8 +247,8 @@ static int suspend_enter(suspend_state_t state)
 }
 
 /**
- *     suspend_devices_and_enter - suspend devices and enter the desired system sleep
- *                       state.
+ *     suspend_devices_and_enter - suspend devices and enter the desired system
+ *                                 sleep state.
  *     @state:           state to enter
  */
 int suspend_devices_and_enter(suspend_state_t state)
@@ -232,15 +258,15 @@ int suspend_devices_and_enter(suspend_state_t state)
        if (!suspend_ops)
                return -ENOSYS;
 
-       if (suspend_ops->set_target) {
-               error = suspend_ops->set_target(state);
+       if (suspend_ops->begin) {
+               error = suspend_ops->begin(state);
                if (error)
-                       return error;
+                       goto Close;
        }
        suspend_console();
        error = device_suspend(PMSG_SUSPEND);
        if (error) {
-               printk(KERN_ERR "Some devices failed to suspend\n");
+               printk(KERN_ERR "PM: Some devices failed to suspend\n");
                goto Resume_console;
        }
 
@@ -268,6 +294,9 @@ int suspend_devices_and_enter(suspend_state_t state)
        device_resume();
  Resume_console:
        resume_console();
+ Close:
+       if (suspend_ops->end)
+               suspend_ops->end();
        return error;
 }
 
@@ -279,9 +308,9 @@ int suspend_devices_and_enter(suspend_state_t state)
  */
 static void suspend_finish(void)
 {
-       thaw_processes();
-       pm_restore_console();
+       suspend_thaw_processes();
        pm_notifier_call_chain(PM_POST_SUSPEND);
+       pm_restore_console();
 }
 
 
@@ -323,7 +352,7 @@ static int enter_state(suspend_state_t state)
        if (!mutex_trylock(&pm_mutex))
                return -EBUSY;
 
-       printk("Syncing filesystems ... ");
+       printk(KERN_INFO "PM: Syncing filesystems ... ");
        sys_sync();
        printk("done.\n");
 
@@ -466,7 +495,7 @@ static struct attribute * g[] = {
 #ifdef CONFIG_PM_TRACE
        &pm_trace_attr.attr,
 #endif
-#ifdef CONFIG_PM_DEBUG
+#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PM_DEBUG)
        &pm_test_attr.attr,
 #endif
        NULL,