tn_link_smr
char tn_link_smr; /* (c) */
#define tn_link_smr tn_spec.tn_link.tn_link_smr
atomic_store_char((char *)&nnode->tn_link_smr, symlink_smr);
if (atomic_load_char(&node->tn_link_smr)) {
if (!atomic_load_char(&node->tn_link_smr))