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[BLKTAP] No need for barrier when updating rsp_prod_pvt.
Signed-off-by: Keir Fraser <keir@xensource.com>
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kfraser@localhost.localdomain committed
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@@ -381,7 +381,6 @@ static inline int write_rsp_to_ring(struct td_state *s, blkif_response_t *rsp)
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rsp_d = RING_GET_RESPONSE(&info->fe_ring, info->fe_ring.rsp_prod_pvt);
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memcpy(rsp_d, rsp, sizeof(blkif_response_t));
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wmb();
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info->fe_ring.rsp_prod_pvt++;
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return 0;
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