page_address() accesses struct page only when WANT_PAGE_VIRTUAL
or HASHED_PAGE_VIRTUAL is defined, otherwise it returns address
based on offset, so we prefetch it conditionally
Signed-off-by: Li RongQing <lirongq...@baidu.com>
---
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index f9555c847f73..b3836092c327 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1953,7 +1953,9 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct
i40e_ring *rx_ring,
struct i40e_rx_buffer *rx_buffer;
rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean);
+#if defined(WANT_PAGE_VIRTUAL) || defined(HASHED_PAGE_VIRTUAL)
prefetchw(rx_buffer->page);
+#endif
/* we are reusing so sync this buffer for CPU use */
dma_sync_single_range_for_cpu(rx_ring->dev,
--
2.16.2
