RDSECTOR
return (RDSECTOR(ump->um_devvp, sector,
if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) {
if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) {
if ((error = RDSECTOR(devvp, sector, ump->um_bsize, &bp)) != 0) {