mpu_spin
spin_unlock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_init(&port->mpu_spin, "lwktinitport");
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
error = ssleep(won, &port->mpu_spin, PCATCH, "waitmsg", 0);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
error = ssleep(won, &port->mpu_spin, 0, "waitmsg", 0);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
spin_unlock(&port->mpu_spin);
spin_lock(&port->mpu_spin);
error = ssleep(port, &port->mpu_spin, flags, "waitport", 0);