IOU_PBUF_RING_INC
if (reg.flags & ~(IOU_PBUF_RING_MMAP | IOU_PBUF_RING_INC))
if (!(reg.flags & IOU_PBUF_RING_INC) && reg.min_left)
if (reg.flags & IOU_PBUF_RING_INC)
i, IOU_PBUF_RING_INC, &ret);