prb_next_reserve_seq
stop_seq = prb_next_reserve_seq(prb);
__nbcon_atomic_flush_pending(prb_next_reserve_seq(prb));
__nbcon_atomic_flush_pending(prb_next_reserve_seq(prb));
__nbcon_atomic_flush_pending_con(con, prb_next_reserve_seq(prb));
__nbcon_atomic_flush_pending_con(ctxt->console, prb_next_reserve_seq(prb));
seq = prb_next_reserve_seq(prb);
((*seq + 1) < prb_next_reserve_seq(rb))) {
u64 prb_next_reserve_seq(struct printk_ringbuffer *rb);