pcb_ext
struct pcb_ext *pcb_ext; /* optional pcb extension */
ASSYM(PCB_EXT, offsetof(struct pcb, pcb_ext));
thread0.td_pcb->pcb_ext = NULL;
struct vm86_kernel *vm86 = &lp->lwp_thread->td_pcb->pcb_ext->ext_vm86;
if (lp->lwp_thread->td_pcb->pcb_ext == 0)
vm86 = &lp->lwp_thread->td_pcb->pcb_ext->ext_vm86;
pcb2->pcb_ext = NULL;
KKASSERT(pcb->pcb_ext == NULL);
struct pcb_ext *pcb_ext; /* optional pcb extension */
struct vm86_kernel *vm86 = &lp->lwp_thread->td_pcb->pcb_ext->ext_vm86;
if (lp->lwp_thread->td_pcb->pcb_ext == 0)
vm86 = &lp->lwp_thread->td_pcb->pcb_ext->ext_vm86;
pcb2->pcb_ext = NULL;
KKASSERT(pcb->pcb_ext == NULL);