memset(key_iv, 0, MAXKEY+MAXIV);
int swsusp_read(void){	int error;	if (IS_ERR(resume_bdev)) {		pr_debug("swsusp: block device not initialised\n");		return PTR_ERR(resume_bdev);	}	error = read_suspend_image();	blkdev_put(resume_bdev);	if (!error)		pr_debug("swsusp: Reading resume file was successful\n");	else		pr_debug("swsusp: Error %d resuming\n", error);	return error;}