ibmveth: Use lighter weight read memory barrier in ibmveth_poll
We want to order the read in ibmveth_rxq_pending_buffer and the read of ibmveth_rxq_buffer_valid which are both cacheable memory. smp_rmb() is good enough for this. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1010,7 +1010,7 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
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if (!ibmveth_rxq_pending_buffer(adapter))
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break;
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rmb();
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smp_rmb();
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if (!ibmveth_rxq_buffer_valid(adapter)) {
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wmb(); /* suggested by larson1 */
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adapter->rx_invalid_buffer++;
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