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net: Take common prefetch code structure into a function

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Many device drivers use the same prefetch code structure to
deal with small L1 cacheline size.
Take this code into a function and call it from the drivers.

Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tariq Toukan
2020-08-26 15:54:16 +03:00
committed by David S. Miller
parent 04e006b483
commit f468f21b7a
12 changed files with 39 additions and 72 deletions
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11
drivers/net/ethernet/intel/iavf/iavf_txrx.c
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@@ -1309,10 +1309,7 @@ static struct sk_buff *iavf_construct_skb(struct iavf_ring *rx_ring,
return NULL;
/* prefetch first cache line of first page */
va = page_address(rx_buffer->page) + rx_buffer->page_offset;
prefetch(va);
#if L1_CACHE_BYTES < 128
prefetch(va + L1_CACHE_BYTES);
#endif
net_prefetch(va);
/* allocate a skb to store the frags */
skb = __napi_alloc_skb(&rx_ring->q_vector->napi,
@@ -1376,10 +1373,8 @@ static struct sk_buff *iavf_build_skb(struct iavf_ring *rx_ring,
return NULL;
/* prefetch first cache line of first page */
va = page_address(rx_buffer->page) + rx_buffer->page_offset;
prefetch(va);
#if L1_CACHE_BYTES < 128
prefetch(va + L1_CACHE_BYTES);
#endif
net_prefetch(va);
/* build an skb around the page buffer */
skb = build_skb(va - IAVF_SKB_PAD, truesize);
if (unlikely(!skb))