bonding: use neighbours for bond_next_slave()

Use the new function __bond_next_slave().

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bonding.h

@@ -76,8 +76,6 @@
 
 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
 
-#define bond_to_slave(ptr) list_entry(ptr, struct slave, list)
-
 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
 #define bond_first_slave(bond) \
 	(bond_has_slaves(bond) ? \
@@ -92,9 +90,7 @@
 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
 
 /* Since bond_first/last_slave can return NULL, these can return NULL too */
-#define bond_next_slave(bond, pos) \
-	(bond_is_last_slave(bond, pos) ? bond_first_slave(bond) : \
-					 bond_to_slave((pos)->list.next))
+#define bond_next_slave(bond, pos) __bond_next_slave(bond, pos)
 
 /**
  * bond_for_each_slave - iterate over all slaves