PC_POLLWAKE
pcp->pc_flag &= ~PC_POLLWAKE;
if (pcp->pc_flag & PC_POLLWAKE)
((pcp->pc_flag & PC_POLLWAKE) == 0)) {
if (pcp->pc_flag & PC_POLLWAKE)
((pcp->pc_flag & PC_POLLWAKE) == 0)) {
if (pcp->pc_flag & PC_POLLWAKE)
pcp->pc_flag |= PC_POLLWAKE;