biowait
error = biowait(bp, "ggetattr");
error = biowait(bp, "gzone");
error = biowait(bp, "gflush");
error = biowait(bp, "gflush");
errorc = biowait(bp, "gread");
error = biowait(bp, "gwrite");
error = biowait(bp, "gdelete");
error = biowait(bp, "gjs_read");
biowait(bp, "gjmdu");
if ((error = biowait(bp, "rdunion")) != 0) {
if ((error = biowait(bp, "wtunion")) != 0) {
biowait(bp, "physrd");
biowait(bp, "physwr");
int biowait(struct bio *bp, const char *wmesg);