common/io/devpoll.c

433 	dp_entry_t	*dpep;
469 	dpep = kmem_zalloc(sizeof (dp_entry_t), KM_SLEEP);
476 	dpep->dpe_pcache = pcp;
482 	devpolltbl[minordev] = dpep;
496 	dp_entry_t	*dpep;
511 	dpep = devpolltbl[minor];
512 	ASSERT(dpep != NULL);
514 	pcp = dpep->dpe_pcache;
552 	mutex_enter(&dpep->dpe_lock);
553 	dpep->dpe_writerwait++;
554 	while (dpep->dpe_refcnt != 0) {
555 		if (!cv_wait_sig_swap(&dpep->dpe_cv, &dpep->dpe_lock)) {
556 			dpep->dpe_writerwait--;
557 			mutex_exit(&dpep->dpe_lock);
562 	dpep->dpe_writerwait--;
563 	dpep->dpe_flag |= DP_WRITER_PRESENT;
564 	dpep->dpe_refcnt++;
565 	mutex_exit(&dpep->dpe_lock);
680 	mutex_enter(&dpep->dpe_lock);
681 	dpep->dpe_flag &= ~DP_WRITER_PRESENT;
682 	ASSERT(dpep->dpe_refcnt == 1);
683 	dpep->dpe_refcnt--;
684 	cv_broadcast(&dpep->dpe_cv);
685 	mutex_exit(&dpep->dpe_lock);
699 	dp_entry_t	*dpep;
712 	dpep = devpolltbl[minor];
714 	ASSERT(dpep != NULL);
715 	pcp = dpep->dpe_pcache;
719 	mutex_enter(&dpep->dpe_lock);
720 	while ((dpep->dpe_flag & DP_WRITER_PRESENT) ||
721 	    (dpep->dpe_writerwait != 0)) {
722 		if (!cv_wait_sig_swap(&dpep->dpe_cv, &dpep->dpe_lock)) {
723 			mutex_exit(&dpep->dpe_lock);
727 	dpep->dpe_refcnt++;
728 	mutex_exit(&dpep->dpe_lock);
743 			DP_REFRELE(dpep);
764 			DP_REFRELE(dpep);
793 				DP_REFRELE(dpep);
840 				DP_REFRELE(dpep);
856 			DP_REFRELE(dpep);
866 			DP_REFRELE(dpep);
879 				DP_REFRELE(dpep);
889 		DP_REFRELE(dpep);
892 	DP_REFRELE(dpep);
919 	dp_entry_t	*dpep;
928 	dpep = devpolltbl[minor];
929 	ASSERT(dpep != NULL);
932 	pcp = dpep->dpe_pcache;
959 	ASSERT(dpep->dpe_refcnt == 0);
960 	kmem_free(dpep, sizeof (dp_entry_t));