4 files changed, 121 insertions, 7 deletions

diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 5f4c006c4b1e..97b0df71303e 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -41,6 +41,8 @@
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 
 #include <linux/uaccess.h>
 #include <linux/export.h>
@@ -182,6 +184,81 @@ static inline void pm_qos_set_value(struct pm_qos_constraints *c, s32 value)
         c->target_value = value;
 }
 
+static inline int pm_qos_get_value(struct pm_qos_constraints *c);
+static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
+{
+        struct pm_qos_object *qos = (struct pm_qos_object *)s->private;
+        struct pm_qos_constraints *c;
+        struct pm_qos_request *req;
+        char *type;
+        unsigned long flags;
+        int tot_reqs = 0;
+        int active_reqs = 0;
+
+        if (IS_ERR_OR_NULL(qos)) {
+                pr_err("%s: bad qos param!\n", __func__);
+                return -EINVAL;
+        }
+        c = qos->constraints;
+        if (IS_ERR_OR_NULL(c)) {
+                pr_err("%s: Bad constraints on qos?\n", __func__);
+                return -EINVAL;
+        }
+
+        /* Lock to ensure we have a snapshot */
+        spin_lock_irqsave(&pm_qos_lock, flags);
+        if (plist_head_empty(&c->list)) {
+                seq_puts(s, "Empty!\n");
+                goto out;
+        }
+
+        switch (c->type) {
+        case PM_QOS_MIN:
+                type = "Minimum";
+                break;
+        case PM_QOS_MAX:
+                type = "Maximum";
+                break;
+        case PM_QOS_SUM:
+                type = "Sum";
+                break;
+        default:
+                type = "Unknown";
+        }
+
+        plist_for_each_entry(req, &c->list, node) {
+                char *state = "Default";
+
+                if ((req->node).prio != c->default_value) {
+                        active_reqs++;
+                        state = "Active";
+                }
+                tot_reqs++;
+                seq_printf(s, "%d: %d: %s\n", tot_reqs,
+                           (req->node).prio, state);
+        }
+
+        seq_printf(s, "Type=%s, Value=%d, Requests: active=%d / total=%d\n",
+                   type, pm_qos_get_value(c), active_reqs, tot_reqs);
+
+out:
+        spin_unlock_irqrestore(&pm_qos_lock, flags);
+        return 0;
+}
+
+static int pm_qos_dbg_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, pm_qos_dbg_show_requests,
+                           inode->i_private);
+}
+
+static const struct file_operations pm_qos_debug_fops = {
+        .open           = pm_qos_dbg_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 /**
  * pm_qos_update_target - manages the constraints list and calls the notifiers
  *  if needed
@@ -509,12 +586,17 @@ int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
 EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
 
 /* User space interface to PM QoS classes via misc devices */
-static int register_pm_qos_misc(struct pm_qos_object *qos)
+static int register_pm_qos_misc(struct pm_qos_object *qos, struct dentry *d)
 {
         qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
         qos->pm_qos_power_miscdev.name = qos->name;
         qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
 
+        if (d) {
+                (void)debugfs_create_file(qos->name, S_IRUGO, d,
+                                          (void *)qos, &pm_qos_debug_fops);
+        }
+
         return misc_register(&qos->pm_qos_power_miscdev);
 }
 
@@ -608,11 +690,16 @@ static int __init pm_qos_power_init(void)
 {
         int ret = 0;
         int i;
+        struct dentry *d;
 
         BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
 
+        d = debugfs_create_dir("pm_qos", NULL);
+        if (IS_ERR_OR_NULL(d))
+                d = NULL;
+
         for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
-                ret = register_pm_qos_misc(pm_qos_array[i]);
+                ret = register_pm_qos_misc(pm_qos_array[i], d);
                 if (ret < 0) {
                         printk(KERN_ERR "pm_qos_param: %s setup failed\n",
                                pm_qos_array[i]->name);
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 0c40c16174b4..c24d5a23bf93 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1472,9 +1472,9 @@ static inline unsigned long preallocate_highmem_fraction(unsigned long nr_pages,
 /**
  * free_unnecessary_pages - Release preallocated pages not needed for the image
  */
-static void free_unnecessary_pages(void)
+static unsigned long free_unnecessary_pages(void)
 {
-        unsigned long save, to_free_normal, to_free_highmem;
+        unsigned long save, to_free_normal, to_free_highmem, free;
 
         save = count_data_pages();
         if (alloc_normal >= save) {
@@ -1495,6 +1495,7 @@ static void free_unnecessary_pages(void)
                 else
                         to_free_normal = 0;
         }
+        free = to_free_normal + to_free_highmem;
 
         memory_bm_position_reset(&copy_bm);
 
@@ -1518,6 +1519,8 @@ static void free_unnecessary_pages(void)
                 swsusp_unset_page_free(page);
                 __free_page(page);
         }
+
+        return free;
 }
 
 /**
@@ -1707,7 +1710,7 @@ int hibernate_preallocate_memory(void)
          * pages in memory, but we have allocated more.  Release the excessive
          * ones now.
          */
-        free_unnecessary_pages();
+        pages -= free_unnecessary_pages();
 
  out:
         stop = ktime_get();
@@ -2310,8 +2313,6 @@ static inline void free_highmem_data(void)
                 free_image_page(buffer, PG_UNSAFE_CLEAR);
 }
 #else
-static inline int get_safe_write_buffer(void) { return 0; }
-
 static unsigned int
 count_highmem_image_pages(struct memory_bitmap *bm) { return 0; }
 
diff --git a/kernel/resource.c b/kernel/resource.c
index 0bcebffc4e77..19f2357dfda3 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -22,6 +22,7 @@
 #include <linux/device.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
+#include <linux/resource_ext.h>
 #include <asm/io.h>
 
 
@@ -1529,6 +1530,30 @@ int iomem_is_exclusive(u64 addr)
         return err;
 }
 
+struct resource_entry *resource_list_create_entry(struct resource *res,
+                                                  size_t extra_size)
+{
+        struct resource_entry *entry;
+
+        entry = kzalloc(sizeof(*entry) + extra_size, GFP_KERNEL);
+        if (entry) {
+                INIT_LIST_HEAD(&entry->node);
+                entry->res = res ? res : &entry->__res;
+        }
+
+        return entry;
+}
+EXPORT_SYMBOL(resource_list_create_entry);
+
+void resource_list_free(struct list_head *head)
+{
+        struct resource_entry *entry, *tmp;
+
+        list_for_each_entry_safe(entry, tmp, head, node)
+                resource_list_destroy_entry(entry);
+}
+EXPORT_SYMBOL(resource_list_free);
+
 static int __init strict_iomem(char *str)
 {
         if (strstr(str, "relaxed"))
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index 1c71382b283d..eb4220a132ec 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -13,5 +13,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/power.h>
 
+EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume);
 EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);