PM / s2idle: Rename freeze_state enum and related items

Rename the freeze_state enum representing the suspend-to-idle state
machine states to s2idle_states and rename the related variables and
functions accordingly.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 144e6d8fafc838d763a78b3d305dc5678bcb5db8..34aebf3e460bf2e97af38c6180bd7fe602afa20f 100644 (file)
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -863,7 +863,7 @@ bool pm_wakeup_pending(void)
 void pm_system_wakeup(void)
 {
        atomic_inc(&pm_abort_suspend);
-       freeze_wake();
+       s2idle_wake();
 }
 EXPORT_SYMBOL_GPL(pm_system_wakeup);
 

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index d43654be00970bc8bb8b0a851215da702fc78f2a..feb43dfbf7bca8763448c87860f128615bfd77ce 100644 (file)
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -237,22 +237,22 @@ static inline bool pm_resume_via_firmware(void)
 }
 
 /* Suspend-to-idle state machnine. */
-enum freeze_state {
-       FREEZE_STATE_NONE,      /* Not suspended/suspending. */
-       FREEZE_STATE_ENTER,     /* Enter suspend-to-idle. */
-       FREEZE_STATE_WAKE,      /* Wake up from suspend-to-idle. */
+enum s2idle_states {
+       S2IDLE_STATE_NONE,      /* Not suspended/suspending. */
+       S2IDLE_STATE_ENTER,     /* Enter suspend-to-idle. */
+       S2IDLE_STATE_WAKE,      /* Wake up from suspend-to-idle. */
 };
 
-extern enum freeze_state __read_mostly suspend_freeze_state;
+extern enum s2idle_states __read_mostly s2idle_state;
 
-static inline bool idle_should_freeze(void)
+static inline bool idle_should_enter_s2idle(void)
 {
-       return unlikely(suspend_freeze_state == FREEZE_STATE_ENTER);
+       return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
 }
 
 extern void __init pm_states_init(void);
 extern void freeze_set_ops(const struct platform_freeze_ops *ops);
-extern void freeze_wake(void);
+extern void s2idle_wake(void);
 
 /**
  * arch_suspend_disable_irqs - disable IRQs for suspend
@@ -284,10 +284,10 @@ static inline bool pm_resume_via_firmware(void) { return false; }
 
 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
-static inline bool idle_should_freeze(void) { return false; }
+static inline bool idle_should_enter_s2idle(void) { return false; }
 static inline void __init pm_states_init(void) {}
 static inline void freeze_set_ops(const struct platform_freeze_ops *ops) {}
-static inline void freeze_wake(void) {}
+static inline void s2idle_wake(void) {}
 #endif /* !CONFIG_SUSPEND */
 
 /* struct pbe is used for creating lists of pages that should be restored

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 6333078a438b58f569064e34b060aeb276336ba7..ae9b579c253359148ee8ab235a513c950ec39b76 100644 (file)
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -57,10 +57,10 @@ EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
 
 static const struct platform_suspend_ops *suspend_ops;
 static const struct platform_freeze_ops *freeze_ops;
-static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);
+static DECLARE_WAIT_QUEUE_HEAD(s2idle_wait_head);
 
-enum freeze_state __read_mostly suspend_freeze_state;
-static DEFINE_SPINLOCK(suspend_freeze_lock);
+enum s2idle_states __read_mostly s2idle_state;
+static DEFINE_SPINLOCK(s2idle_lock);
 
 void freeze_set_ops(const struct platform_freeze_ops *ops)
 {
@@ -69,21 +69,21 @@ void freeze_set_ops(const struct platform_freeze_ops *ops)
        unlock_system_sleep();
 }
 
-static void freeze_begin(void)
+static void s2idle_begin(void)
 {
-       suspend_freeze_state = FREEZE_STATE_NONE;
+       s2idle_state = S2IDLE_STATE_NONE;
 }
 
-static void freeze_enter(void)
+static void s2idle_enter(void)
 {
        trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, true);
 
-       spin_lock_irq(&suspend_freeze_lock);
+       spin_lock_irq(&s2idle_lock);
        if (pm_wakeup_pending())
                goto out;
 
-       suspend_freeze_state = FREEZE_STATE_ENTER;
-       spin_unlock_irq(&suspend_freeze_lock);
+       s2idle_state = S2IDLE_STATE_ENTER;
+       spin_unlock_irq(&s2idle_lock);
 
        get_online_cpus();
        cpuidle_resume();
@@ -91,17 +91,17 @@ static void freeze_enter(void)
        /* Push all the CPUs into the idle loop. */
        wake_up_all_idle_cpus();
        /* Make the current CPU wait so it can enter the idle loop too. */
-       wait_event(suspend_freeze_wait_head,
-                  suspend_freeze_state == FREEZE_STATE_WAKE);
+       wait_event(s2idle_wait_head,
+                  s2idle_state == S2IDLE_STATE_WAKE);
 
        cpuidle_pause();
        put_online_cpus();
 
-       spin_lock_irq(&suspend_freeze_lock);
+       spin_lock_irq(&s2idle_lock);
 
  out:
-       suspend_freeze_state = FREEZE_STATE_NONE;
-       spin_unlock_irq(&suspend_freeze_lock);
+       s2idle_state = S2IDLE_STATE_NONE;
+       spin_unlock_irq(&s2idle_lock);
 
        trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, false);
 }
@@ -118,12 +118,12 @@ static void s2idle_loop(void)
                /*
                 * Suspend-to-idle equals
                 * frozen processes + suspended devices + idle processors.
-                * Thus freeze_enter() should be called right after
+                * Thus s2idle_enter() should be called right after
                 * all devices have been suspended.
                 */
                error = dpm_noirq_suspend_devices(PMSG_SUSPEND);
                if (!error)
-                       freeze_enter();
+                       s2idle_enter();
 
                dpm_noirq_resume_devices(PMSG_RESUME);
                if (error && (error != -EBUSY || !pm_wakeup_pending())) {
@@ -148,18 +148,18 @@ static void s2idle_loop(void)
        pm_pr_dbg("resume from suspend-to-idle\n");
 }
 
-void freeze_wake(void)
+void s2idle_wake(void)
 {
        unsigned long flags;
 
-       spin_lock_irqsave(&suspend_freeze_lock, flags);
-       if (suspend_freeze_state > FREEZE_STATE_NONE) {
-               suspend_freeze_state = FREEZE_STATE_WAKE;
-               wake_up(&suspend_freeze_wait_head);
+       spin_lock_irqsave(&s2idle_lock, flags);
+       if (s2idle_state > S2IDLE_STATE_NONE) {
+               s2idle_state = S2IDLE_STATE_WAKE;
+               wake_up(&s2idle_wait_head);
        }
-       spin_unlock_irqrestore(&suspend_freeze_lock, flags);
+       spin_unlock_irqrestore(&s2idle_lock, flags);
 }
-EXPORT_SYMBOL_GPL(freeze_wake);
+EXPORT_SYMBOL_GPL(s2idle_wake);
 
 static bool valid_state(suspend_state_t state)
 {
@@ -552,7 +552,7 @@ static int enter_state(suspend_state_t state)
                return -EBUSY;
 
        if (state == PM_SUSPEND_TO_IDLE)
-               freeze_begin();
+               s2idle_begin();
 
 #ifndef CONFIG_SUSPEND_SKIP_SYNC
        trace_suspend_resume(TPS("sync_filesystems"), 0, true);

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 6c23e30c0e5cc5addb9f3bf027161bb366686ef6..2ea4b7b23044497eac151b84a4b4042697a2bedb 100644 (file)
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -158,7 +158,7 @@ static void cpuidle_idle_call(void)
        }
 
        /*
-        * Suspend-to-idle ("freeze") is a system state in which all user space
+        * Suspend-to-idle ("s2idle") is a system state in which all user space
         * has been frozen, all I/O devices have been suspended and the only
         * activity happens here and in iterrupts (if any).  In that case bypass
         * the cpuidle governor and go stratight for the deepest idle state
@@ -167,8 +167,8 @@ static void cpuidle_idle_call(void)
         * until a proper wakeup interrupt happens.
         */
 
-       if (idle_should_freeze() || dev->use_deepest_state) {
-               if (idle_should_freeze()) {
+       if (idle_should_enter_s2idle() || dev->use_deepest_state) {
+               if (idle_should_enter_s2idle()) {
                        entered_state = cpuidle_enter_freeze(drv, dev);
                        if (entered_state > 0) {
                                local_irq_enable();