Function spa_refcount_zero

freebsd/contrib/openzfs/module/zfs/spa_misc.c:914–920

* Check to see if the spa refcount is zero. Must be called with * spa_namespace_lock held. We really compare against spa_minref, which is the * number of references acquired when opening a pool */

 * number of references acquired when opening a pool
 */
boolean_t
spa_refcount_zero(spa_t *spa)
{
	ASSERT(MUTEX_HELD(&spa_namespace_lock));

	return (zfs_refcount_count(&spa->spa_refcount) == spa->spa_minref);
}

/*
 * ==========================================================================