TDF_ALLOCATED_STACK
KASSERT((td->td_flags & TDF_ALLOCATED_STACK) && td->td_kstack &&
flags |= td->td_flags & (TDF_ALLOCATED_THREAD|TDF_ALLOCATED_STACK);
if (flags & TDF_ALLOCATED_STACK) {
flags |= TDF_ALLOCATED_STACK;
} else if (td->td_flags & TDF_ALLOCATED_STACK) {