PBWAIT
ASSERT(p->p_poolflag & PBWAIT);
p->p_poolflag &= ~PBWAIT;
ASSERT(p->p_poolflag & PBWAIT);
p->p_poolflag |= PBWAIT;
!(p->p_poolflag & PBWAIT)) {
p->p_poolflag |= PBWAIT;
ASSERT(p->p_poolflag & PBWAIT);
while (p->p_poolflag & PBWAIT)
if (p->p_poolflag & PBWAIT) {
while (p->p_poolflag & PBWAIT)