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can: rework skb reserved data handling

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Added accessor and skb_reserve helpers for struct can_skb_priv.
Removed pointless skb_headroom() check.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
CC: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Hartkopp
2013-01-28 08:33:33 +00:00
committed by David S. Miller
parent cef401de7b
commit 2bf3440d7b
6 changed files with 21 additions and 13 deletions
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10
include/linux/can/skb.h
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@@ -32,4 +32,14 @@ struct can_skb_priv {
struct can_frame cf[0];
};
static inline struct can_skb_priv *can_skb_prv(struct sk_buff *skb)
{
return (struct can_skb_priv *)(skb->head);
}
static inline void can_skb_reserve(struct sk_buff *skb)
{
skb_reserve(skb, sizeof(struct can_skb_priv));
}
#endif /* CAN_SKB_H */