LWPFS_SEL
l->lwp_pcb.pcb_fs = LWPFS_SEL;
if (p->lwp_pcb.pcb_fs == LWPFS_SEL)
case LWPFS_SEL:
if (pcb->pcb_fs == LWPFS_SEL || pcb->pcb_fs == 0) {
if (pcb->pcb_fs == LWPFS_SEL)
if (rp->r_fs == LWPFS_SEL)
rval = pcb->pcb_fs = LWPFS_SEL;