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-rw-r--r--kernel/power/power.h7
-rw-r--r--kernel/power/user.c28
2 files changed, 34 insertions, 1 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h
index bfe999f7b27..87ecb1856ee 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 d991d3b0e5a..4c24ca5d62e 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;