vmem_seg_create
vsp = vmem_seg_create(vmp, oldseg, addr, endaddr);
vsp = vmem_seg_create(vmp, span, addr, endaddr);
span = vmem_seg_create(vmp, knext->vs_aprev, start, end);
newseg = vmem_seg_create(vmp, span, start, end);
vsp = vmem_seg_create(vmp, vsp->vs_aprev, addr, addr + size);
vmem_seg_create(vmp, vsp, addr_end, vs_end));
vmem_seg_create(vmp, vsp->vs_aprev, vs_start, addr));
vmem_seg_create(vmp, rotor->vs_aprev, addr, addr + size));
span = vmem_seg_create(vmp, vmp->vm_seg0.vs_aprev, start, end);
newseg = vmem_seg_create(vmp, span, start, end);
vsp = vmem_seg_create(vmp, vsp->vs_aprev, addr, addr + size);
vmem_seg_create(vmp, vsp, addr_end, vs_end));
vmem_seg_create(vmp, vsp->vs_aprev, vs_start, addr));
vmem_seg_create(vmp, rotor->vs_aprev, addr, addr + size));