static unsigned int get_inode_number(void)
{
	int i, inum = 0;
	int error;

retry:
	if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
		return 0;

	spin_lock(&proc_inum_lock);
	error = idr_get_new(&proc_inum_idr, NULL, &i);
	spin_unlock(&proc_inum_lock);
	if (error == -EAGAIN)
		goto retry;
	else if (error)
		return 0;

	inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST;

	/* inum will never be more than 0xf0ffffff, so no check
	 * for overflow.
	 */

	return inum;
}
static unsigned int get_inode_number(void)
{
	int i, inum = 0;
	int error;

retry:
	if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
		return 0;

	spin_lock(&proc_inum_lock);
	error = idr_get_new(&proc_inum_idr, NULL, &i);
	spin_unlock(&proc_inum_lock);
	if (error == -EAGAIN)
		goto retry;
	else if (error)
		return 0;

	inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST;

	 

	return inum;
}