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/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
index f864ce1..f44f75a 100644
--- a/net/nfc/digital_dep.c
+++ b/net/nfc/digital_dep.c
@@ -226,8 +226,7 @@
return ERR_PTR(-ENOMEM);
}
- memcpy(skb_put(new_skb, ddev->remote_payload_max), skb->data,
- ddev->remote_payload_max);
+ skb_put_data(new_skb, skb->data, ddev->remote_payload_max);
skb_pull(skb, ddev->remote_payload_max);
ddev->chaining_skb = skb;
@@ -277,8 +276,7 @@
ddev->chaining_skb = new_skb;
}
- memcpy(skb_put(ddev->chaining_skb, resp->len), resp->data,
- resp->len);
+ skb_put_data(ddev->chaining_skb, resp->data, resp->len);
kfree_skb(resp);
resp = NULL;
@@ -525,7 +523,7 @@
if (gb_len) {
atr_req->pp |= DIGITAL_GB_BIT;
- memcpy(skb_put(skb, gb_len), gb, gb_len);
+ skb_put_data(skb, gb, gb_len);
}
digital_skb_push_dep_sod(ddev, skb);
@@ -1012,8 +1010,7 @@
if (ddev->did) {
dep_res->pfb |= DIGITAL_NFC_DEP_PFB_DID_BIT;
- memcpy(skb_put(skb, sizeof(ddev->did)), &ddev->did,
- sizeof(ddev->did));
+ skb_put_data(skb, &ddev->did, sizeof(ddev->did));
}
ddev->curr_nfc_dep_pni =
@@ -1057,8 +1054,7 @@
if (ddev->did) {
dep_res->pfb |= DIGITAL_NFC_DEP_PFB_DID_BIT;
- memcpy(skb_put(skb, sizeof(ddev->did)), &ddev->did,
- sizeof(ddev->did));
+ skb_put_data(skb, &ddev->did, sizeof(ddev->did));
}
digital_skb_push_dep_sod(ddev, skb);
@@ -1325,8 +1321,7 @@
if (ddev->did) {
dep_res->pfb |= DIGITAL_NFC_DEP_PFB_DID_BIT;
- memcpy(skb_put(skb, sizeof(ddev->did)), &ddev->did,
- sizeof(ddev->did));
+ skb_put_data(skb, &ddev->did, sizeof(ddev->did));
}
ddev->curr_nfc_dep_pni =