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networking: introduce and use skb_put_data()

소스 검색 
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>
This commit is contained in:
Johannes Berg
2017-06-16 14:29:20 +02:00
committed by David S. Miller
부모 b080db5853
커밋 59ae1d127a
252개의 변경된 파일과 622개의 추가작업 그리고 741개의 파일을 삭제
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6
drivers/net/wireless/ath/carl9170/rx.c
파일 보기

@@ -481,7 +481,7 @@ static struct sk_buff *carl9170_rx_copy_data(u8 *buf, int len)
skb = dev_alloc_skb(len + reserved);
if (likely(skb)) {
skb_reserve(skb, reserved);
memcpy(skb_put(skb, len), buf, len);
skb_put_data(skb, buf, len);
}
return skb;
@@ -916,7 +916,7 @@ static void carl9170_rx_stream(struct ar9170 *ar, void *buf, unsigned int len)
}
}
memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
skb_put_data(ar->rx_failover, tbuf, tlen);
ar->rx_failover_missing -= tlen;
if (ar->rx_failover_missing <= 0) {
@@ -958,7 +958,7 @@ static void carl9170_rx_stream(struct ar9170 *ar, void *buf, unsigned int len)
* the rx - descriptor comes round again.
*/
memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
skb_put_data(ar->rx_failover, tbuf, tlen);
ar->rx_failover_missing = clen - tlen;
return;
}