bonding, net: Move last_rx update into bonding recv logic

	The only user of the net_device->last_rx field is bonding.
This patch adds a conditional update of last_rx to the bonding special
logic in skb_bond_should_drop, causing last_rx to only be updated when
the ARP monitor is running.

	This frees network device drivers from the necessity of
updating last_rx, which can have cache line thrash issues.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/if.h b/include/linux/if.h
index 65246846c844..2a6e29620a96 100644
--- a/include/linux/if.h
+++ b/include/linux/if.h
@@ -65,6 +65,7 @@
 #define IFF_BONDING     0x20            /* bonding master or slave      */
 #define IFF_SLAVE_NEEDARP 0x40          /* need ARPs for validation     */
 #define IFF_ISATAP      0x80            /* ISATAP interface (RFC4214)   */
+#define IFF_MASTER_ARPMON 0x100         /* bonding master, ARP mon in use */
 
 #define IF_GET_IFACE    0x0001          /* for querying only */
 #define IF_GET_PROTO    0x0002