2 files changed, 34 insertions, 1 deletions

diff --git a/kernel/power/power.h b/kernel/power/power.h
index bfe999f7b272..87ecb1856ee8 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -117,7 +117,12 @@ extern void snapshot_free_unused_memory(struct snapshot_handle *handle);
 #define SNAPSHOT_FREE_SWAP_PAGES        _IO(SNAPSHOT_IOC_MAGIC, 9)
 #define SNAPSHOT_SET_SWAP_FILE          _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned int)
 #define SNAPSHOT_S2RAM                  _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_IOC_MAXNR      11
+#define SNAPSHOT_PMOPS                  _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned int)
+#define SNAPSHOT_IOC_MAXNR      12
+
+#define PMOPS_PREPARE   1
+#define PMOPS_ENTER     2
+#define PMOPS_FINISH    3
 
 /**
  *      The bitmap is used for tracing allocated swap pages
diff --git a/kernel/power/user.c b/kernel/power/user.c
index d991d3b0e5a4..4c24ca5d62e3 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -11,6 +11,7 @@
 
 #include <linux/suspend.h>
 #include <linux/syscalls.h>
+#include <linux/reboot.h>
 #include <linux/string.h>
 #include <linux/device.h>
 #include <linux/miscdevice.h>
@@ -313,6 +314,33 @@ OutS3:
                 up(&pm_sem);
                 break;
 
+        case SNAPSHOT_PMOPS:
+                switch (arg) {
+
+                case PMOPS_PREPARE:
+                        if (pm_ops->prepare) {
+                                error = pm_ops->prepare(PM_SUSPEND_DISK);
+                        }
+                        break;
+
+                case PMOPS_ENTER:
+                        kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+                        error = pm_ops->enter(PM_SUSPEND_DISK);
+                        break;
+
+                case PMOPS_FINISH:
+                        if (pm_ops && pm_ops->finish) {
+                                pm_ops->finish(PM_SUSPEND_DISK);
+                        }
+                        break;
+
+                default:
+                        printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg);
+                        error = -EINVAL;
+
+                }
+                break;
+
         default:
                 error = -ENOTTY;