CRL_F_READ
crltab.crl_active = CRL_F_READ;
mtpr(bp->b_blkno<<8 | STXCS_IE | CRL_F_READ, PR_STXCS);
case CRL_F_READ:
case CRL_F_READ:
mtpr(bp->b_blkno<<8 | STXCS_IE | CRL_F_READ, PR_STXCS);