[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}

To clearly state the intent of copying from linear sk_buffs, _offset being a
overly long variant but interesting for the sake of saving some bytes.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
index 422eaf8ea12d..25b75b615188 100644
--- a/drivers/net/via-velocity.c
+++ b/drivers/net/via-velocity.c
@@ -1339,7 +1339,8 @@ static inline int velocity_rx_copy(struct sk_buff **rx_skb, int pkt_size,
                         if (vptr->flags & VELOCITY_FLAGS_IP_ALIGN)
                                 skb_reserve(new_skb, 2);
 
-                        memcpy(new_skb->data, rx_skb[0]->data, pkt_size);
+                        skb_copy_from_linear_data(rx_skb[0], new_skb->data,
+                                                  pkt_size);
                         *rx_skb = new_skb;
                         ret = 0;
                 }
@@ -1927,7 +1928,7 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
         if (pktlen < ETH_ZLEN) {
                 /* Cannot occur until ZC support */
                 pktlen = ETH_ZLEN;
-                memcpy(tdinfo->buf, skb->data, skb->len);
+                skb_copy_from_linear_data(skb, tdinfo->buf, skb->len);
                 memset(tdinfo->buf + skb->len, 0, ETH_ZLEN - skb->len);
                 tdinfo->skb = skb;
                 tdinfo->skb_dma[0] = tdinfo->buf_dma;
@@ -1943,7 +1944,7 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
                 int nfrags = skb_shinfo(skb)->nr_frags;
                 tdinfo->skb = skb;
                 if (nfrags > 6) {
-                        memcpy(tdinfo->buf, skb->data, skb->len);
+                        skb_copy_from_linear_data(skb, tdinfo->buf, skb->len);
                         tdinfo->skb_dma[0] = tdinfo->buf_dma;
                         td_ptr->tdesc0.pktsize =
                         td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);