/* implement "/proc/key-users" to provides a list of the key users  */
static int proc_key_users_open(struct inode *inode, struct file *file)
/* implement "/proc/key-users" to provides a list of the key users  */
static int proc_key_users_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &proc_key_users_ops);
}