rwsem_spin_on_owner  812 kernel/locking/rwsem.c 		owner_state = rwsem_spin_on_owner(sem, nonspinnable);
rwsem_spin_on_owner 1230 kernel/locking/rwsem.c 		    rwsem_spin_on_owner(sem, RWSEM_NONSPINNABLE) == OWNER_NULL)