[SK_BUFF]: Introduce skb_copy_to_linear_data{_offset}

To clearly state the intent of copying to 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@ghostprotocols.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index df7f279ec408..ad7792dc1a04 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -2501,7 +2501,8 @@ qeth_process_inbound_buffer(struct qeth_card *card,
                         vlan_tag = qeth_rebuild_skb(card, skb, hdr);
                 else { /*in case of OSN*/
                         skb_push(skb, sizeof(struct qeth_hdr));
-                        memcpy(skb->data, hdr, sizeof(struct qeth_hdr));
+                        skb_copy_to_linear_data(skb, hdr,
+                                                sizeof(struct qeth_hdr));
                 }
                 /* is device UP ? */
                 if (!(card->dev->flags & IFF_UP)){
@@ -3870,9 +3871,9 @@ __qeth_prepare_skb(struct qeth_card *card, struct sk_buff *skb, int ipv)
                  * memcpys instead of one memmove to save cycles.
                  */
                 skb_push(skb, VLAN_HLEN);
-                memcpy(skb->data, skb->data + 4, 4);
-                memcpy(skb->data + 4, skb->data + 8, 4);
-                memcpy(skb->data + 8, skb->data + 12, 4);
+                skb_copy_to_linear_data(skb, skb->data + 4, 4);
+                skb_copy_to_linear_data_offset(skb, 4, skb->data + 8, 4);
+                skb_copy_to_linear_data_offset(skb, 8, skb->data + 12, 4);
                 tag = (u16 *)(skb->data + 12);
                 /*
                  * first two bytes  = ETH_P_8021Q (0x8100)