ZIO_STAGE_DONE
ZIO_STAGE_DONE)
ZIO_STAGE_DONE)
while (zio->io_stage < ZIO_STAGE_DONE) {
ASSERT(stage <= ZIO_STAGE_DONE);
ASSERT(zio->io_stage == ZIO_STAGE_DONE);
zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE);