Without this patch igb was unable to find ipv6_find_hdr() in kernel < 3.14.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
--- /dev/null
+diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
+index 55a1405c..1409e20 100644
+--- a/drivers/net/ethernet/intel/igb/igb_main.c
++++ b/drivers/net/ethernet/intel/igb/igb_main.c
+@@ -34,6 +34,7 @@
+ #include <linux/slab.h>
+ #include <net/checksum.h>
+ #include <net/ip6_checksum.h>
++#include <net/ipv6.h>
+ #include <linux/net_tstamp.h>
+ #include <linux/mii.h>
+ #include <linux/ethtool.h>