Simply replace the SMP barrier with atomic thread fence for i40e hw ring sacn, if there is no synchronization point.
Signed-off-by: Joyce Kong <joyce.k...@arm.com> Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com> --- drivers/net/i40e/i40e_rxtx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index 9aaabfd92..86e2f083e 100644 --- a/drivers/net/i40e/i40e_rxtx.c +++ b/drivers/net/i40e/i40e_rxtx.c @@ -482,7 +482,8 @@ i40e_rx_scan_hw_ring(struct i40e_rx_queue *rxq) I40E_RXD_QW1_STATUS_SHIFT; } - rte_smp_rmb(); + /* This barrier is to order loads of different words in the descriptor */ + rte_atomic_thread_fence(__ATOMIC_ACQUIRE); /* Compute how many status bits were set */ for (j = 0, nb_dd = 0; j < I40E_LOOK_AHEAD; j++) { -- 2.17.1