CHFS_REF_OBSOLETE
if (!CHFS_REF_OBSOLETE(nref))
while(CHFS_REF_OBSOLETE(nref)) {
!CHFS_REF_OBSOLETE(eb->gc_node)) {
if (CHFS_REF_OBSOLETE(nref)) {
if (CHFS_REF_OBSOLETE(nref)) {
KASSERT(!CHFS_REF_OBSOLETE(nref));
if (!CHFS_REF_OBSOLETE(nref)) {
KASSERT(!CHFS_REF_OBSOLETE(this->node->nref));