BLKIF_OP_WRITE_BARRIER
case BLKIF_OP_WRITE_BARRIER:
op == BLKIF_OP_WRITE_BARRIER ||
case BLKIF_OP_WRITE_BARRIER:
if (xreq->xr_op == BLKIF_OP_WRITE_BARRIER ||
BLKIF_OP_WRITE_BARRIER);
BLKIF_OP_WRITE_BARRIER);
if ((req->operation == BLKIF_OP_WRITE_BARRIER) ||
if ((req->operation != BLKIF_OP_WRITE_BARRIER) &&