push_head
push_head(jobs, job);
int (*push_head)(struct k3_ring *ring, void *elm);
if (ring->ops && ring->ops->push_head)
ret = ring->ops->push_head(ring, elem);
.push_head = k3_ringacc_ring_push_head_io,
.push_head = k3_ringacc_ring_push_head_proxy,