7 files changed, 32 insertions, 20 deletions

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 37170d4dd9a6..f4f2073711d3 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -973,16 +973,20 @@ static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr,
 static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
                             const char *buf, size_t n)
 {
-        unsigned int maj, min;
         dev_t res;
-        int ret = -EINVAL;
+        int len = n;
+        char *name;
 
-        if (sscanf(buf, "%u:%u", &maj, &min) != 2)
-                goto out;
+        if (len && buf[len-1] == '\n')
+                len--;
+        name = kstrndup(buf, len, GFP_KERNEL);
+        if (!name)
+                return -ENOMEM;
 
-        res = MKDEV(maj,min);
-        if (maj != MAJOR(res) || min != MINOR(res))
-                goto out;
+        res = name_to_dev_t(name);
+        kfree(name);
+        if (!res)
+                return -EINVAL;
 
         lock_system_sleep();
         swsusp_resume_device = res;
@@ -990,9 +994,7 @@ static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
         printk(KERN_INFO "PM: Starting manual resume from disk\n");
         noresume = 0;
         software_resume();
-        ret = n;
- out:
-        return ret;
+        return n;
 }
 
 power_attr(resume);
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 1d1bf630e6e9..6271bc4073ef 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -282,8 +282,8 @@ struct kobject *power_kobj;
  *      state - control system power state.
  *
  *      show() returns what states are supported, which is hard-coded to
- *      'standby' (Power-On Suspend), 'mem' (Suspend-to-RAM), and
- *      'disk' (Suspend-to-Disk).
+ *      'freeze' (Low-Power Idle), 'standby' (Power-On Suspend),
+ *      'mem' (Suspend-to-RAM), and 'disk' (Suspend-to-Disk).
  *
  *      store() accepts one of those strings, translates it into the
  *      proper enumerated value, and initiates a suspend transition.
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 7d4b7ffb3c1d..1ca753106557 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -49,6 +49,8 @@ static inline char *check_image_kernel(struct swsusp_info *info)
  */
 #define SPARE_PAGES     ((1024 * 1024) >> PAGE_SHIFT)
 
+asmlinkage int swsusp_save(void);
+
 /* kernel/power/hibernate.c */
 extern bool freezer_test_done;
 
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 8dff9b48075a..884b77058864 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -66,6 +66,7 @@ static struct pm_qos_constraints cpu_dma_constraints = {
         .list = PLIST_HEAD_INIT(cpu_dma_constraints.list),
         .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
         .default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+        .no_constraint_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
         .type = PM_QOS_MIN,
         .notifiers = &cpu_dma_lat_notifier,
 };
@@ -79,6 +80,7 @@ static struct pm_qos_constraints network_lat_constraints = {
         .list = PLIST_HEAD_INIT(network_lat_constraints.list),
         .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
         .default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+        .no_constraint_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
         .type = PM_QOS_MIN,
         .notifiers = &network_lat_notifier,
 };
@@ -93,6 +95,7 @@ static struct pm_qos_constraints network_tput_constraints = {
         .list = PLIST_HEAD_INIT(network_tput_constraints.list),
         .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
         .default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+        .no_constraint_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
         .type = PM_QOS_MAX,
         .notifiers = &network_throughput_notifier,
 };
@@ -128,7 +131,7 @@ static const struct file_operations pm_qos_power_fops = {
 static inline int pm_qos_get_value(struct pm_qos_constraints *c)
 {
         if (plist_head_empty(&c->list))
-                return c->default_value;
+                return c->no_constraint_value;
 
         switch (c->type) {
         case PM_QOS_MIN:
@@ -170,6 +173,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 {
         unsigned long flags;
         int prev_value, curr_value, new_value;
+        int ret;
 
         spin_lock_irqsave(&pm_qos_lock, flags);
         prev_value = pm_qos_get_value(c);
@@ -205,13 +209,15 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 
         trace_pm_qos_update_target(action, prev_value, curr_value);
         if (prev_value != curr_value) {
-                blocking_notifier_call_chain(c->notifiers,
-                                             (unsigned long)curr_value,
-                                             NULL);
-                return 1;
+                ret = 1;
+                if (c->notifiers)
+                        blocking_notifier_call_chain(c->notifiers,
+                                                     (unsigned long)curr_value,
+                                                     NULL);
         } else {
-                return 0;
+                ret = 0;
         }
+        return ret;
 }
 
 /**
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index d9f61a145802..149e745eaa52 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1268,7 +1268,7 @@ static void free_unnecessary_pages(void)
  * [number of saveable pages] - [number of pages that can be freed in theory]
  *
  * where the second term is the sum of (1) reclaimable slab pages, (2) active
- * and (3) inactive anonymouns pages, (4) active and (5) inactive file pages,
+ * and (3) inactive anonymous pages, (4) active and (5) inactive file pages,
  * minus mapped file pages.
  */
 static unsigned long minimum_image_size(unsigned long saveable)
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 62ee437b5c7e..90b3d9366d1a 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -39,7 +39,7 @@ static const struct platform_suspend_ops *suspend_ops;
 
 static bool need_suspend_ops(suspend_state_t state)
 {
-        return !!(state > PM_SUSPEND_FREEZE);
+        return state > PM_SUSPEND_FREEZE;
 }
 
 static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);
diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c
index 8f50de394d22..019069c84ff6 100644
--- a/kernel/power/wakelock.c
+++ b/kernel/power/wakelock.c
@@ -18,6 +18,8 @@
 #include <linux/rbtree.h>
 #include <linux/slab.h>
 
+#include "power.h"
+
 static DEFINE_MUTEX(wakelocks_lock);
 
 struct wakelock {