common_mutex
extern const char *common_mutex(kmutex_t *);
common_mutex(tbl.dbt_lock));
common_mutex(&xprt->xp_req_lock));
common_mutex(&xprt->xp_thread_lock));
common_mutex(&pool->p_thread_lock));
common_mutex(&pool->p_req_lock));
common_mutex(&pool->p_creator_lock));