ib_bth_get_psn
psn = ib_bth_get_psn(ohdr) | IB_BTH_REQ_ACK;
psn = ib_bth_get_psn(ohdr);
u32 psn = ib_bth_get_psn(packet->ohdr);
u32 psn = ib_bth_get_psn(packet->ohdr);
psn = ib_bth_get_psn(packet->ohdr);
*psn = mask_psn(ib_bth_get_psn(ohdr));
*psn = mask_psn(ib_bth_get_psn(ohdr));
psn = ib_bth_get_psn(ohdr);