can: rework skb reserved data handling

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>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/can/skb.h b/include/linux/can/skb.h
index 4b0f24d3a878..2f0543f7510c 100644
--- a/include/linux/can/skb.h
+++ b/include/linux/can/skb.h
@@ -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 */