networking: introduce and use skb_put_data()
A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.
An spatch similar to the one for skb_put_zero() converts many
of the places using it:
@@
identifier p, p2;
expression len, skb, data;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_data(skb, data, len);
|
-p = (t)skb_put(skb, len);
+p = skb_put_data(skb, data, len);
)
(
p2 = (t2)p;
-memcpy(p2, data, len);
|
-memcpy(p, data, len);
)
@@
type t, t2;
identifier p, p2;
expression skb, data;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
|
-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
)
(
p2 = (t2)p;
-memcpy(p2, data, sizeof(*p));
|
-memcpy(p, data, sizeof(*p));
)
@@
expression skb, len, data;
@@
-memcpy(skb_put(skb, len), data, len);
+skb_put_data(skb, data, len);
(again, manually post-processed to retain some comments)
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 5ec1095..4e64de3 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -1090,8 +1090,7 @@ dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
*((u32 *) sb->data) = aal0;
skb_put(sb, sizeof(u32));
- memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
- cell, ATM_CELL_PAYLOAD);
+ skb_put_data(sb, cell, ATM_CELL_PAYLOAD);
ATM_SKB(sb)->vcc = vcc;
__net_timestamp(sb);
@@ -1159,8 +1158,7 @@ dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
return;
}
skb_queue_walk(&rpp->queue, sb)
- memcpy(skb_put(skb, sb->len),
- sb->data, sb->len);
+ skb_put_data(skb, sb->data, sb->len);
recycle_rx_pool_skb(card, rpp);
@@ -1322,8 +1320,7 @@ idt77252_rx_raw(struct idt77252_dev *card)
*((u32 *) sb->data) = header;
skb_put(sb, sizeof(u32));
- memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
- ATM_CELL_PAYLOAD);
+ skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD);
ATM_SKB(sb)->vcc = vcc;
__net_timestamp(sb);
@@ -2014,7 +2011,7 @@ idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
}
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
- memcpy(skb_put(skb, 52), cell, 52);
+ skb_put_data(skb, cell, 52);
return idt77252_send_skb(vcc, skb, 1);
}