IO_RING_F_DRAIN_NEXT
ctx->int_flags |= IO_RING_F_DRAIN_NEXT;
if (unlikely(ctx->int_flags & (IO_RING_F_OP_RESTRICTED | IO_RING_F_DRAIN_ACTIVE | IO_RING_F_DRAIN_NEXT))) {
if (unlikely(ctx->int_flags & IO_RING_F_DRAIN_NEXT) && !ctx->submit_state.link.head) {
ctx->int_flags &= ~IO_RING_F_DRAIN_NEXT;