Simply replace the rte_smp_mb barriers with SEQ_CST atomic thread fence, if there is no load/store operations.
Signed-off-by: Joyce Kong <joyce.k...@arm.com> Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com> --- examples/vhost_blk/vhost_blk.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/examples/vhost_blk/vhost_blk.c b/examples/vhost_blk/vhost_blk.c index bb293d492..7ea60863d 100644 --- a/examples/vhost_blk/vhost_blk.c +++ b/examples/vhost_blk/vhost_blk.c @@ -86,9 +86,9 @@ enqueue_task(struct vhost_blk_task *task) */ used->ring[used->idx & (vq->vring.size - 1)].id = task->req_idx; used->ring[used->idx & (vq->vring.size - 1)].len = task->data_len; - rte_smp_mb(); + rte_atomic_thread_fence(__ATOMIC_SEQ_CST); used->idx++; - rte_smp_mb(); + rte_atomic_thread_fence(__ATOMIC_SEQ_CST); rte_vhost_clr_inflight_desc_split(task->ctrlr->vid, vq->id, used->idx, task->req_idx); @@ -112,12 +112,12 @@ enqueue_task_packed(struct vhost_blk_task *task) desc->id = task->buffer_id; desc->addr = 0; - rte_smp_mb(); + rte_atomic_thread_fence(__ATOMIC_SEQ_CST); if (vq->used_wrap_counter) desc->flags |= VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED; else desc->flags &= ~(VIRTQ_DESC_F_AVAIL | VIRTQ_DESC_F_USED); - rte_smp_mb(); + rte_atomic_thread_fence(__ATOMIC_SEQ_CST); rte_vhost_clr_inflight_desc_packed(task->ctrlr->vid, vq->id, task->inflight_idx); -- 2.29.2