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[NETLINK]: Introduce nlmsg_hdr() helper

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For the common "(struct nlmsghdr *)skb->data" sequence, so that we reduce the
number of direct accesses to skb->data and for consistency with all the other
cast skb member helpers.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-04-25 19:08:35 -07:00 • committed by David S. Miller
commit b529ccf279
15 changed files with 23 additions and 18 deletions
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2
net/decnet/netfilter/dn_rtmsg.c
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@ -102,7 +102,7 @@ static unsigned int dnrmg_hook(unsigned int hook,
static inline void dnrmg_receive_user_skb(struct sk_buff *skb)
{
struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data;
struct nlmsghdr *nlh = nlmsg_hdr(skb);
if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
return;