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/freebsd-11-stable/sys/dev/digi/
H A Ddigi.c1089 int ehead, etail; local
1160 etail = sc->gdata->eout;
1161 if (ehead == etail) {
1166 "6000 useless polls %x %x\n", ehead, etail));
1172 while (ehead != etail) {
1173 event = *(volatile struct event *)(sc->memevent + etail);
1175 etail = (etail + 4) & sc->gdata->imax;
1300 sc->gdata->eout = etail;

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