target/linux/mvebu/patches-5.4/007-net-mvneta-move-header-prefetch-in-mvneta_swbm_rx_fr.patch

   1 From fa383f6b77a2ed788266fa8fbfb659aa284d2f58 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Sat, 19 Oct 2019 10:13:25 +0200
   4 Subject: [PATCH 5/7] net: mvneta: move header prefetch in mvneta_swbm_rx_frame
   5
   6 Move data buffer prefetch in mvneta_swbm_rx_frame after
   7 dma_sync_single_range_for_cpu
   8
   9 Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
  10 Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
  11 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/ethernet/marvell/mvneta.c | 7 +++----
  15  1 file changed, 3 insertions(+), 4 deletions(-)
  16
  17 --- a/drivers/net/ethernet/marvell/mvneta.c
  18 +++ b/drivers/net/ethernet/marvell/mvneta.c
  19 @@ -2038,6 +2038,9 @@ mvneta_swbm_rx_frame(struct mvneta_port
  20                                 rx_desc->buf_phys_addr,
  21                                 len, dma_dir);
  22
  23 +       /* Prefetch header */
  24 +       prefetch(data);
  25 +
  26         xdp->data_hard_start = data;
  27         xdp->data = data + MVNETA_SKB_HEADROOM + MVNETA_MH_SIZE;
  28         xdp->data_end = xdp->data + data_len;
  29 @@ -2135,14 +2138,10 @@ static int mvneta_rx_swbm(struct napi_st
  30         while (rx_proc < budget && rx_proc < rx_todo) {
  31                 struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq);
  32                 u32 rx_status, index;
  33 -               unsigned char *data;
  34                 struct page *page;
  35
  36                 index = rx_desc - rxq->descs;
  37                 page = (struct page *)rxq->buf_virt_addr[index];
  38 -               data = page_address(page);
  39 -               /* Prefetch header */
  40 -               prefetch(data);
  41
  42                 rx_status = rx_desc->status;
  43                 rx_proc++;