[NET]: Store skb->timestamp as offset to a base timestamp

Reduces skb size by 8 bytes on 64-bit.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index eed9090d77f1..32ef7975a139 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -332,8 +332,12 @@ static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_
                 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
         }
 
-        if (mask & HCI_CMSG_TSTAMP)
-                put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(skb->stamp), &skb->stamp);
+        if (mask & HCI_CMSG_TSTAMP) {
+                struct timeval tv;
+
+                skb_get_timestamp(skb, &tv);
+                put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(tv), &tv);
+        }
 }
  
 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,