lockref_put_or_lock
if (lockref_put_or_lock(&pcl->lockref))
if (lockref_put_or_lock(&gl->gl_lockref))
if (lockref_put_or_lock(&qd->qd_lockref))
if (lockref_put_or_lock(&dqp->q_lockref))
EXPORT_SYMBOL(lockref_put_or_lock);