+ OutS3:
+ mutex_unlock(&pm_mutex);
+ break;
+
+ case SNAPSHOT_PMOPS:
+ switch (arg) {
+
+ case PMOPS_PREPARE:
+ if (pm_ops && pm_ops->prepare)
+ error = pm_ops->prepare(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ case PMOPS_ENTER:
+ kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+ if (pm_ops && pm_ops->enter)
+ error = pm_ops->enter(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ case PMOPS_FINISH:
+ if (pm_ops && pm_ops->finish)
+ pm_ops->finish(PM_SUSPEND_DISK);
+ else
+ error = -ENOSYS;
+ break;
+
+ default:
+ printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument %ld\n", arg);
+ error = -EINVAL;
+
+ }
+ break;
+
+ case SNAPSHOT_SET_SWAP_AREA:
+ if (data->bitmap) {
+ error = -EPERM;
+ } else {
+ struct resume_swap_area swap_area;
+ dev_t swdev;
+
+ error = copy_from_user(&swap_area, (void __user *)arg,
+ sizeof(struct resume_swap_area));
+ if (error) {
+ error = -EFAULT;
+ break;
+ }
+
+ /*
+ * User space encodes device types as two-byte values,
+ * so we need to recode them
+ */
+ swdev = old_decode_dev(swap_area.dev);
+ if (swdev) {
+ offset = swap_area.offset;
+ data->swap = swap_type_of(swdev, offset, NULL);
+ if (data->swap < 0)
+ error = -ENODEV;
+ } else {
+ data->swap = -1;
+ error = -EINVAL;
+ }
+ }