6 files changed, 146 insertions, 138 deletions

diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c3b81c30e5d5..43191815f874 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_PM_SLEEP)		+= console.o
 obj-$(CONFIG_FREEZER)           += process.o
 obj-$(CONFIG_SUSPEND)           += suspend.o
 obj-$(CONFIG_PM_TEST_SUSPEND)   += suspend_test.o
-obj-$(CONFIG_HIBERNATION)       += swsusp.o hibernate.o snapshot.o swap.o user.o
+obj-$(CONFIG_HIBERNATION)       += hibernate.o snapshot.o swap.o user.o
 obj-$(CONFIG_HIBERNATION_NVS)   += hibernate_nvs.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)       += poweroff.o
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 04a9e90d248f..bbfe472d7524 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -32,6 +32,7 @@ static int noresume = 0;
 static char resume_file[256] = CONFIG_PM_STD_PARTITION;
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
+int in_suspend __nosavedata = 0;
 
 enum {
         HIBERNATION_INVALID,
@@ -202,6 +203,35 @@ static void platform_recover(int platform_mode)
 }
 
 /**
+ *      swsusp_show_speed - print the time elapsed between two events.
+ *      @start: Starting event.
+ *      @stop: Final event.
+ *      @nr_pages -     number of pages processed between @start and @stop
+ *      @msg -          introductory message to print
+ */
+
+void swsusp_show_speed(struct timeval *start, struct timeval *stop,
+                        unsigned nr_pages, char *msg)
+{
+        s64 elapsed_centisecs64;
+        int centisecs;
+        int k;
+        int kps;
+
+        elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
+        do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
+        centisecs = elapsed_centisecs64;
+        if (centisecs == 0)
+                centisecs = 1;  /* avoid div-by-zero */
+        k = nr_pages * (PAGE_SIZE / 1024);
+        kps = (k * 100) / centisecs;
+        printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
+                        msg, k,
+                        centisecs / 100, centisecs % 100,
+                        kps / 1000, (kps % 1000) / 10);
+}
+
+/**
  *      create_image - freeze devices that need to be frozen with interrupts
  *      off, create the hibernation image and thaw those devices.  Control
  *      reappears in this routine after a restore.
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 347d2cc88cd0..0998c7139053 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -220,6 +220,7 @@ static struct attribute_group attr_group = {
 
 #ifdef CONFIG_PM_RUNTIME
 struct workqueue_struct *pm_wq;
+EXPORT_SYMBOL_GPL(pm_wq);
 
 static int __init pm_start_workqueue(void)
 {
diff --git a/kernel/power/process.c b/kernel/power/process.c
index cc2e55373b68..5ade1bdcf366 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/freezer.h>
+#include <linux/delay.h>
 
 /* 
  * Timeout for stopping processes
@@ -41,7 +42,7 @@ static int try_to_freeze_tasks(bool sig_only)
         do_gettimeofday(&start);
 
         end_time = jiffies + TIMEOUT;
-        do {
+        while (true) {
                 todo = 0;
                 read_lock(&tasklist_lock);
                 do_each_thread(g, p) {
@@ -62,10 +63,15 @@ static int try_to_freeze_tasks(bool sig_only)
                                 todo++;
                 } while_each_thread(g, p);
                 read_unlock(&tasklist_lock);
-                yield();                        /* Yield is okay here */
-                if (time_after(jiffies, end_time))
+                if (!todo || time_after(jiffies, end_time))
                         break;
-        } while (todo);
+
+                /*
+                 * We need to retry, but first give the freezing tasks some
+                 * time to enter the regrigerator.
+                 */
+                msleep(10);
+        }
 
         do_gettimeofday(&end);
         elapsed_csecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 890f6b11b1d3..09b2b0ae9e9d 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -38,6 +38,107 @@ struct swsusp_header {
 
 static struct swsusp_header *swsusp_header;
 
+/**
+ *      The following functions are used for tracing the allocated
+ *      swap pages, so that they can be freed in case of an error.
+ */
+
+struct swsusp_extent {
+        struct rb_node node;
+        unsigned long start;
+        unsigned long end;
+};
+
+static struct rb_root swsusp_extents = RB_ROOT;
+
+static int swsusp_extents_insert(unsigned long swap_offset)
+{
+        struct rb_node **new = &(swsusp_extents.rb_node);
+        struct rb_node *parent = NULL;
+        struct swsusp_extent *ext;
+
+        /* Figure out where to put the new node */
+        while (*new) {
+                ext = container_of(*new, struct swsusp_extent, node);
+                parent = *new;
+                if (swap_offset < ext->start) {
+                        /* Try to merge */
+                        if (swap_offset == ext->start - 1) {
+                                ext->start--;
+                                return 0;
+                        }
+                        new = &((*new)->rb_left);
+                } else if (swap_offset > ext->end) {
+                        /* Try to merge */
+                        if (swap_offset == ext->end + 1) {
+                                ext->end++;
+                                return 0;
+                        }
+                        new = &((*new)->rb_right);
+                } else {
+                        /* It already is in the tree */
+                        return -EINVAL;
+                }
+        }
+        /* Add the new node and rebalance the tree. */
+        ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
+        if (!ext)
+                return -ENOMEM;
+
+        ext->start = swap_offset;
+        ext->end = swap_offset;
+        rb_link_node(&ext->node, parent, new);
+        rb_insert_color(&ext->node, &swsusp_extents);
+        return 0;
+}
+
+/**
+ *      alloc_swapdev_block - allocate a swap page and register that it has
+ *      been allocated, so that it can be freed in case of an error.
+ */
+
+sector_t alloc_swapdev_block(int swap)
+{
+        unsigned long offset;
+
+        offset = swp_offset(get_swap_page_of_type(swap));
+        if (offset) {
+                if (swsusp_extents_insert(offset))
+                        swap_free(swp_entry(swap, offset));
+                else
+                        return swapdev_block(swap, offset);
+        }
+        return 0;
+}
+
+/**
+ *      free_all_swap_pages - free swap pages allocated for saving image data.
+ *      It also frees the extents used to register which swap entres had been
+ *      allocated.
+ */
+
+void free_all_swap_pages(int swap)
+{
+        struct rb_node *node;
+
+        while ((node = swsusp_extents.rb_node)) {
+                struct swsusp_extent *ext;
+                unsigned long offset;
+
+                ext = container_of(node, struct swsusp_extent, node);
+                rb_erase(node, &swsusp_extents);
+                for (offset = ext->start; offset <= ext->end; offset++)
+                        swap_free(swp_entry(swap, offset));
+
+                kfree(ext);
+        }
+}
+
+int swsusp_swap_in_use(void)
+{
+        return (swsusp_extents.rb_node != NULL);
+}
+
 /*
  * General things
  */
@@ -336,7 +437,7 @@ static int save_image(struct swap_map_handle *handle,
                 if (ret)
                         break;
                 if (!(nr_pages % m))
-                        printk("\b\b\b\b%3d%%", nr_pages / m);
+                        printk(KERN_CONT "\b\b\b\b%3d%%", nr_pages / m);
                 nr_pages++;
         }
         err2 = wait_on_bio_chain(&bio);
@@ -344,9 +445,9 @@ static int save_image(struct swap_map_handle *handle,
         if (!ret)
                 ret = err2;
         if (!ret)
-                printk("\b\b\b\bdone\n");
+                printk(KERN_CONT "\b\b\b\bdone\n");
         else
-                printk("\n");
+                printk(KERN_CONT "\n");
         swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
         return ret;
 }
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 6a07f4dbf2f8..5b3601bd1893 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -56,133 +56,3 @@
 #include "power.h"
 
 int in_suspend __nosavedata = 0;
-
-/**
- *      The following functions are used for tracing the allocated
- *      swap pages, so that they can be freed in case of an error.
- */
-
-struct swsusp_extent {
-        struct rb_node node;
-        unsigned long start;
-        unsigned long end;
-};
-
-static struct rb_root swsusp_extents = RB_ROOT;
-
-static int swsusp_extents_insert(unsigned long swap_offset)
-{
-        struct rb_node **new = &(swsusp_extents.rb_node);
-        struct rb_node *parent = NULL;
-        struct swsusp_extent *ext;
-
-        /* Figure out where to put the new node */
-        while (*new) {
-                ext = container_of(*new, struct swsusp_extent, node);
-                parent = *new;
-                if (swap_offset < ext->start) {
-                        /* Try to merge */
-                        if (swap_offset == ext->start - 1) {
-                                ext->start--;
-                                return 0;
-                        }
-                        new = &((*new)->rb_left);
-                } else if (swap_offset > ext->end) {
-                        /* Try to merge */
-                        if (swap_offset == ext->end + 1) {
-                                ext->end++;
-                                return 0;
-                        }
-                        new = &((*new)->rb_right);
-                } else {
-                        /* It already is in the tree */
-                        return -EINVAL;
-                }
-        }
-        /* Add the new node and rebalance the tree. */
-        ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
-        if (!ext)
-                return -ENOMEM;
-
-        ext->start = swap_offset;
-        ext->end = swap_offset;
-        rb_link_node(&ext->node, parent, new);
-        rb_insert_color(&ext->node, &swsusp_extents);
-        return 0;
-}
-
-/**
- *      alloc_swapdev_block - allocate a swap page and register that it has
- *      been allocated, so that it can be freed in case of an error.
- */
-
-sector_t alloc_swapdev_block(int swap)
-{
-        unsigned long offset;
-
-        offset = swp_offset(get_swap_page_of_type(swap));
-        if (offset) {
-                if (swsusp_extents_insert(offset))
-                        swap_free(swp_entry(swap, offset));
-                else
-                        return swapdev_block(swap, offset);
-        }
-        return 0;
-}
-
-/**
- *      free_all_swap_pages - free swap pages allocated for saving image data.
- *      It also frees the extents used to register which swap entres had been
- *      allocated.
- */
-
-void free_all_swap_pages(int swap)
-{
-        struct rb_node *node;
-
-        while ((node = swsusp_extents.rb_node)) {
-                struct swsusp_extent *ext;
-                unsigned long offset;
-
-                ext = container_of(node, struct swsusp_extent, node);
-                rb_erase(node, &swsusp_extents);
-                for (offset = ext->start; offset <= ext->end; offset++)
-                        swap_free(swp_entry(swap, offset));
-
-                kfree(ext);
-        }
-}
-
-int swsusp_swap_in_use(void)
-{
-        return (swsusp_extents.rb_node != NULL);
-}
-
-/**
- *      swsusp_show_speed - print the time elapsed between two events represented by
- *      @start and @stop
- *
- *      @nr_pages -     number of pages processed between @start and @stop
- *      @msg -          introductory message to print
- */
-
-void swsusp_show_speed(struct timeval *start, struct timeval *stop,
-                        unsigned nr_pages, char *msg)
-{
-        s64 elapsed_centisecs64;
-        int centisecs;
-        int k;
-        int kps;
-
-        elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
-        do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
-        centisecs = elapsed_centisecs64;
-        if (centisecs == 0)
-                centisecs = 1;  /* avoid div-by-zero */
-        k = nr_pages * (PAGE_SIZE / 1024);
-        kps = (k * 100) / centisecs;
-        printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
-                        msg, k,
-                        centisecs / 100, centisecs % 100,
-                        kps / 1000, (kps % 1000) / 10);
-}