4 files changed, 108 insertions, 84 deletions

diff --git a/kernel/power/main.c b/kernel/power/main.c
index a18efed75fa7..9a59d042ea84 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -296,8 +296,8 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr,
 	suspend_state_t i;
 
 	for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
-		if (pm_states[i].state)
-			s += sprintf(s,"%s ", pm_states[i].label);
+		if (pm_states[i])
+			s += sprintf(s,"%s ", pm_states[i]);
 
 #endif
 	if (hibernation_available())
@@ -311,8 +311,7 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr,
 static suspend_state_t decode_state(const char *buf, size_t n)
 {
 #ifdef CONFIG_SUSPEND
-	suspend_state_t state = PM_SUSPEND_MIN;
-	struct pm_sleep_state *s;
+	suspend_state_t state;
 #endif
 	char *p;
 	int len;
@@ -325,10 +324,12 @@ static suspend_state_t decode_state(const char *buf, size_t n)
 		return PM_SUSPEND_MAX;
 
 #ifdef CONFIG_SUSPEND
-	for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++)
-		if (s->state && len == strlen(s->label)
-		    && !strncmp(buf, s->label, len))
-			return s->state;
+	for (state = PM_SUSPEND_MIN; state < PM_SUSPEND_MAX; state++) {
+		const char *label = pm_states[state];
+
+		if (label && len == strlen(label) && !strncmp(buf, label, len))
+			return state;
+	}
 #endif
 
 	return PM_SUSPEND_ON;
@@ -446,8 +447,8 @@ static ssize_t autosleep_show(struct kobject *kobj,
 
 #ifdef CONFIG_SUSPEND
 	if (state < PM_SUSPEND_MAX)
-		return sprintf(buf, "%s\n", pm_states[state].state ?
-					pm_states[state].label : "error");
+		return sprintf(buf, "%s\n", pm_states[state] ?
+					pm_states[state] : "error");
 #endif
 #ifdef CONFIG_HIBERNATION
 	return sprintf(buf, "disk\n");
diff --git a/kernel/power/power.h b/kernel/power/power.h
index c60f13b5270a..5d49dcac2537 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -178,13 +178,8 @@ extern void swsusp_show_speed(struct timeval *, struct timeval *,
 				unsigned int, char *);
 
 #ifdef CONFIG_SUSPEND
-struct pm_sleep_state {
-	const char *label;
-	suspend_state_t state;
-};
-
 /* kernel/power/suspend.c */
-extern struct pm_sleep_state pm_states[];
+extern const char *pm_states[];
 
 extern int suspend_devices_and_enter(suspend_state_t state);
 #else /* !CONFIG_SUSPEND */
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index ed35a4790afe..9a071bea80eb 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -31,20 +31,11 @@
 
 #include "power.h"
 
-struct pm_sleep_state pm_states[PM_SUSPEND_MAX] = {
-	[PM_SUSPEND_FREEZE] = { .label = "freeze", .state = PM_SUSPEND_FREEZE },
-	[PM_SUSPEND_STANDBY] = { .label = "standby", },
-	[PM_SUSPEND_MEM] = { .label = "mem", },
-};
+static const char *pm_labels[] = { "mem", "standby", "freeze", };
+const char *pm_states[PM_SUSPEND_MAX];
 
 static const struct platform_suspend_ops *suspend_ops;
 static const struct platform_freeze_ops *freeze_ops;
-
-static bool need_suspend_ops(suspend_state_t state)
-{
-	return state > PM_SUSPEND_FREEZE;
-}
-
 static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);
 static bool suspend_freeze_wake;
 
@@ -97,10 +88,7 @@ static bool relative_states;
 static int __init sleep_states_setup(char *str)
 {
 	relative_states = !strncmp(str, "1", 1);
-	if (relative_states) {
-		pm_states[PM_SUSPEND_MEM].state = PM_SUSPEND_FREEZE;
-		pm_states[PM_SUSPEND_FREEZE].state = 0;
-	}
+	pm_states[PM_SUSPEND_FREEZE] = pm_labels[relative_states ? 0 : 2];
 	return 1;
 }
 
@@ -113,20 +101,20 @@ __setup("relative_sleep_states=", sleep_states_setup);
 void suspend_set_ops(const struct platform_suspend_ops *ops)
 {
 	suspend_state_t i;
-	int j = PM_SUSPEND_MAX - 1;
+	int j = 0;
 
 	lock_system_sleep();
 
 	suspend_ops = ops;
 	for (i = PM_SUSPEND_MEM; i >= PM_SUSPEND_STANDBY; i--)
-		if (valid_state(i))
-			pm_states[j--].state = i;
-		else if (!relative_states)
-			pm_states[j--].state = 0;
+		if (valid_state(i)) {
+			pm_states[i] = pm_labels[j++];
+		} else if (!relative_states) {
+			pm_states[i] = NULL;
+			j++;
+		}
 
-	pm_states[j--].state = PM_SUSPEND_FREEZE;
-	while (j >= PM_SUSPEND_MIN)
-		pm_states[j--].state = 0;
+	pm_states[PM_SUSPEND_FREEZE] = pm_labels[j];
 
 	unlock_system_sleep();
 }
@@ -145,6 +133,65 @@ int suspend_valid_only_mem(suspend_state_t state)
 }
 EXPORT_SYMBOL_GPL(suspend_valid_only_mem);
 
+static bool sleep_state_supported(suspend_state_t state)
+{
+	return state == PM_SUSPEND_FREEZE || (suspend_ops && suspend_ops->enter);
+}
+
+static int platform_suspend_prepare(suspend_state_t state)
+{
+	return state != PM_SUSPEND_FREEZE && suspend_ops->prepare ?
+		suspend_ops->prepare() : 0;
+}
+
+static int platform_suspend_prepare_late(suspend_state_t state)
+{
+	return state != PM_SUSPEND_FREEZE && suspend_ops->prepare_late ?
+		suspend_ops->prepare_late() : 0;
+}
+
+static void platform_suspend_wake(suspend_state_t state)
+{
+	if (state != PM_SUSPEND_FREEZE && suspend_ops->wake)
+		suspend_ops->wake();
+}
+
+static void platform_suspend_finish(suspend_state_t state)
+{
+	if (state != PM_SUSPEND_FREEZE && suspend_ops->finish)
+		suspend_ops->finish();
+}
+
+static int platform_suspend_begin(suspend_state_t state)
+{
+	if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin)
+		return freeze_ops->begin();
+	else if (suspend_ops->begin)
+		return suspend_ops->begin(state);
+	else
+		return 0;
+}
+
+static void platform_suspend_end(suspend_state_t state)
+{
+	if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end)
+		freeze_ops->end();
+	else if (suspend_ops->end)
+		suspend_ops->end();
+}
+
+static void platform_suspend_recover(suspend_state_t state)
+{
+	if (state != PM_SUSPEND_FREEZE && suspend_ops->recover)
+		suspend_ops->recover();
+}
+
+static bool platform_suspend_again(suspend_state_t state)
+{
+	return state != PM_SUSPEND_FREEZE && suspend_ops->suspend_again ?
+		suspend_ops->suspend_again() : false;
+}
+
 static int suspend_test(int level)
 {
 #ifdef CONFIG_PM_DEBUG
@@ -168,7 +215,7 @@ static int suspend_prepare(suspend_state_t state)
 {
 	int error;
 
-	if (need_suspend_ops(state) && (!suspend_ops || !suspend_ops->enter))
+	if (!sleep_state_supported(state))
 		return -EPERM;
 
 	pm_prepare_console();
@@ -214,23 +261,18 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
 {
 	int error;
 
-	if (need_suspend_ops(state) && suspend_ops->prepare) {
-		error = suspend_ops->prepare();
-		if (error)
-			goto Platform_finish;
-	}
+	error = platform_suspend_prepare(state);
+	if (error)
+		goto Platform_finish;
 
 	error = dpm_suspend_end(PMSG_SUSPEND);
 	if (error) {
 		printk(KERN_ERR "PM: Some devices failed to power down\n");
 		goto Platform_finish;
 	}
-
-	if (need_suspend_ops(state) && suspend_ops->prepare_late) {
-		error = suspend_ops->prepare_late();
-		if (error)
-			goto Platform_wake;
-	}
+	error = platform_suspend_prepare_late(state);
+	if (error)
+		goto Platform_wake;
 
 	if (suspend_test(TEST_PLATFORM))
 		goto Platform_wake;
@@ -278,15 +320,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
 	ftrace_start();
 
  Platform_wake:
-	if (need_suspend_ops(state) && suspend_ops->wake)
-		suspend_ops->wake();
-
+	platform_suspend_wake(state);
 	dpm_resume_start(PMSG_RESUME);
 
  Platform_finish:
-	if (need_suspend_ops(state) && suspend_ops->finish)
-		suspend_ops->finish();
-
+	platform_suspend_finish(state);
 	return error;
 }
 
@@ -299,18 +337,13 @@ int suspend_devices_and_enter(suspend_state_t state)
 	int error;
 	bool wakeup = false;
 
-	if (need_suspend_ops(state) && !suspend_ops)
+	if (!sleep_state_supported(state))
 		return -ENOSYS;
 
-	if (need_suspend_ops(state) && suspend_ops->begin) {
-		error = suspend_ops->begin(state);
-		if (error)
-			goto Close;
-	} else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin) {
-		error = freeze_ops->begin();
-		if (error)
-			goto Close;
-	}
+	error = platform_suspend_begin(state);
+	if (error)
+		goto Close;
+
 	suspend_console();
 	suspend_test_start();
 	error = dpm_suspend_start(PMSG_SUSPEND);
@@ -324,25 +357,20 @@ int suspend_devices_and_enter(suspend_state_t state)
 
 	do {
 		error = suspend_enter(state, &wakeup);
-	} while (!error && !wakeup && need_suspend_ops(state)
-		&& suspend_ops->suspend_again && suspend_ops->suspend_again());
+	} while (!error && !wakeup && platform_suspend_again(state));
 
  Resume_devices:
 	suspend_test_start();
 	dpm_resume_end(PMSG_RESUME);
 	suspend_test_finish("resume devices");
 	resume_console();
- Close:
-	if (need_suspend_ops(state) && suspend_ops->end)
-		suspend_ops->end();
-	else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end)
-		freeze_ops->end();
 
+ Close:
+	platform_suspend_end(state);
 	return error;
 
  Recover_platform:
-	if (need_suspend_ops(state) && suspend_ops->recover)
-		suspend_ops->recover();
+	platform_suspend_recover(state);
 	goto Resume_devices;
 }
 
@@ -395,7 +423,7 @@ static int enter_state(suspend_state_t state)
 	printk("done.\n");
 	trace_suspend_resume(TPS("sync_filesystems"), 0, false);
 
-	pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label);
+	pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]);
 	error = suspend_prepare(state);
 	if (error)
 		goto Unlock;
@@ -404,7 +432,7 @@ static int enter_state(suspend_state_t state)
 		goto Finish;
 
 	trace_suspend_resume(TPS("suspend_enter"), state, false);
-	pr_debug("PM: Entering %s sleep\n", pm_states[state].label);
+	pr_debug("PM: Entering %s sleep\n", pm_states[state]);
 	pm_restrict_gfp_mask();
 	error = suspend_devices_and_enter(state);
 	pm_restore_gfp_mask();
diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 269b097e78ea..2f524928b6aa 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -92,13 +92,13 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state)
 	}
 
 	if (state == PM_SUSPEND_MEM) {
-		printk(info_test, pm_states[state].label);
+		printk(info_test, pm_states[state]);
 		status = pm_suspend(state);
 		if (status == -ENODEV)
 			state = PM_SUSPEND_STANDBY;
 	}
 	if (state == PM_SUSPEND_STANDBY) {
-		printk(info_test, pm_states[state].label);
+		printk(info_test, pm_states[state]);
 		status = pm_suspend(state);
 	}
 	if (status < 0)
@@ -141,8 +141,8 @@ static int __init setup_test_suspend(char *value)
 	/* "=mem" ==> "mem" */
 	value++;
 	for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
-		if (!strcmp(pm_states[i].label, value)) {
-			test_state = pm_states[i].state;
+		if (!strcmp(pm_states[i], value)) {
+			test_state = i;
 			return 0;
 		}
 
@@ -162,8 +162,8 @@ static int __init test_suspend(void)
 	/* PM is initialized by now; is that state testable? */
 	if (test_state == PM_SUSPEND_ON)
 		goto done;
-	if (!pm_states[test_state].state) {
-		printk(warn_bad_state, pm_states[test_state].label);
+	if (!pm_states[test_state]) {
+		printk(warn_bad_state, pm_states[test_state]);
 		goto done;
 	}