static int mnt_alloc_id(struct mount *mnt)
{
	int res = ida_alloc(&mnt_id_ida, GFP_KERNEL);

	if (res < 0)
		return res;
	mnt->mnt_id = res;
	return 0;
}
static int mnt_alloc_id(struct mount *mnt)
{
	int res = ida_alloc(&mnt_id_ida, GFP_KERNEL);

	if (res < 0)
		return res;
	mnt->mnt_id = res;
	return 0;
}