zfs_fuid_domain_t
zfs_fuid_domain_t *fuid_domain;
fuid_domain = kmem_alloc(sizeof (zfs_fuid_domain_t), KM_SLEEP);
list_create(&fuidp->z_domains, sizeof (zfs_fuid_domain_t),
offsetof(zfs_fuid_domain_t, z_next));
zfs_fuid_domain_t *zdomain;
kmem_free(zdomain, sizeof (zfs_fuid_domain_t));
zfs_fuid_domain_t *zdomain;