683 	struct eventfd *efd;  in eventfd_create()  local
696 	efd = malloc(sizeof(*efd), M_EPOLL, M_WAITOK | M_ZERO);  in eventfd_create()
697 	efd->efd_flags = flags;  in eventfd_create()
698 	efd->efd_count = initval;  in eventfd_create()
699 	mtx_init(&efd->efd_lock, "eventfd", NULL, MTX_DEF);  in eventfd_create()
701 	knlist_init_mtx(&efd->efd_sel.si_note, &efd->efd_lock);  in eventfd_create()
707 	finit(fp, fflags, DTYPE_LINUXEFD, efd, &eventfdops);  in eventfd_create()
736 	struct eventfd *efd;  in eventfd_close()  local
738 	efd = fp->f_data;  in eventfd_close()
739 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)  in eventfd_close()
742 	seldrain(&efd->efd_sel);  in eventfd_close()
743 	knlist_destroy(&efd->efd_sel.si_note);  in eventfd_close()
746 	mtx_destroy(&efd->efd_lock);  in eventfd_close()
747 	free(efd, M_EPOLL);  in eventfd_close()
756 	struct eventfd *efd;  in eventfd_read()  local
760 	efd = fp->f_data;  in eventfd_read()
761 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)  in eventfd_read()
768 	mtx_lock(&efd->efd_lock);  in eventfd_read()
770 	if (efd->efd_count == 0) {  in eventfd_read()
772 			mtx_unlock(&efd->efd_lock);  in eventfd_read()
775 		error = mtx_sleep(&efd->efd_count, &efd->efd_lock, PCATCH, "lefdrd", 0);  in eventfd_read()
780 		if ((efd->efd_flags & LINUX_EFD_SEMAPHORE) != 0) {  in eventfd_read()
782 			--efd->efd_count;  in eventfd_read()
784 			count = efd->efd_count;  in eventfd_read()
785 			efd->efd_count = 0;  in eventfd_read()
787 		KNOTE_LOCKED(&efd->efd_sel.si_note, 0);  in eventfd_read()
788 		selwakeup(&efd->efd_sel);  in eventfd_read()
789 		wakeup(&efd->efd_count);  in eventfd_read()
790 		mtx_unlock(&efd->efd_lock);  in eventfd_read()
793 		mtx_unlock(&efd->efd_lock);  in eventfd_read()
802 	struct eventfd *efd;  in eventfd_write()  local
806 	efd = fp->f_data;  in eventfd_write()
807 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)  in eventfd_write()
819 	mtx_lock(&efd->efd_lock);  in eventfd_write()
821 	if (UINT64_MAX - efd->efd_count <= count) {  in eventfd_write()
823 			mtx_unlock(&efd->efd_lock);  in eventfd_write()
828 		error = mtx_sleep(&efd->efd_count, &efd->efd_lock,  in eventfd_write()
834 		efd->efd_count += count;  in eventfd_write()
835 		KNOTE_LOCKED(&efd->efd_sel.si_note, 0);  in eventfd_write()
836 		selwakeup(&efd->efd_sel);  in eventfd_write()
837 		wakeup(&efd->efd_count);  in eventfd_write()
839 	mtx_unlock(&efd->efd_lock);  in eventfd_write()
848 	struct eventfd *efd;  in eventfd_poll()  local
851 	efd = fp->f_data;  in eventfd_poll()
852 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)  in eventfd_poll()
855 	mtx_lock(&efd->efd_lock);  in eventfd_poll()
856 	if ((events & (POLLIN|POLLRDNORM)) && efd->efd_count > 0)  in eventfd_poll()
858 	if ((events & (POLLOUT|POLLWRNORM)) && UINT64_MAX - 1 > efd->efd_count)  in eventfd_poll()
861 		selrecord(td, &efd->efd_sel);  in eventfd_poll()
862 	mtx_unlock(&efd->efd_lock);  in eventfd_poll()
871 	struct eventfd *efd;  in eventfd_kqfilter()  local
873 	efd = fp->f_data;  in eventfd_kqfilter()
874 	if (fp->f_type != DTYPE_LINUXEFD || efd == NULL)  in eventfd_kqfilter()
877 	mtx_lock(&efd->efd_lock);  in eventfd_kqfilter()
886 		mtx_unlock(&efd->efd_lock);  in eventfd_kqfilter()
890 	kn->kn_hook = efd;  in eventfd_kqfilter()
891 	knlist_add(&efd->efd_sel.si_note, kn, 1);  in eventfd_kqfilter()
892 	mtx_unlock(&efd->efd_lock);  in eventfd_kqfilter()
900 	struct eventfd *efd = kn->kn_hook;  in filt_eventfddetach()  local
902 	mtx_lock(&efd->efd_lock);  in filt_eventfddetach()
903 	knlist_remove(&efd->efd_sel.si_note, kn, 1);  in filt_eventfddetach()
904 	mtx_unlock(&efd->efd_lock);  in filt_eventfddetach()
911 	struct eventfd *efd = kn->kn_hook;  in filt_eventfdread()  local
914 	mtx_assert(&efd->efd_lock, MA_OWNED);  in filt_eventfdread()
915 	ret = (efd->efd_count > 0);  in filt_eventfdread()
924 	struct eventfd *efd = kn->kn_hook;  in filt_eventfdwrite()  local
927 	mtx_assert(&efd->efd_lock, MA_OWNED);  in filt_eventfdwrite()
928 	ret = (UINT64_MAX - 1 > efd->efd_count);  in filt_eventfdwrite()