bbusy
if (bbusy(bp, false, 0, NULL) == 0)
while (bbusy(obp, false, 0, NULL) == EPASSTHROUGH)
err = bbusy(bp, ((slpflag & PCATCH) != 0), slptimeo, NULL);
err = bbusy(bp, 0, 0, NULL);
error = bbusy(bp, catch_p, slptimeo, NULL);
error = bbusy(bp, catch_p, slptimeo, NULL);
error = bbusy(bp, catch_p, slptimeo, NULL);
error = bbusy(bp, catch_p, slptimeo, NULL);
if (bbusy(bp, 0, 0, &wl->wl_mtx)) {
if (bbusy(bp, 0, 0, &wl->wl_mtx) == 0) {
int bbusy(buf_t *, bool, int, kmutex_t *);
error = bbusy(bp, false, 0, NULL);
error = bbusy(bp, false, 0, NULL);
error = bbusy(bp, catch, slptimeo, NULL);
error = bbusy(bp, catch, slptimeo, NULL);
error = bbusy(bp, false, hz / 10 + 1, NULL);