[IPV4]: Multipath modules need a license to prevent kernel tainting.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/multipath_drr.c b/net/ipv4/multipath_drr.c
index cf2e6bc..c9cf872 100644
--- a/net/ipv4/multipath_drr.c
+++ b/net/ipv4/multipath_drr.c
@@ -31,6 +31,7 @@
 #include <linux/igmp.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/module.h>
 #include <linux/mroute.h>
 #include <linux/init.h>
 #include <net/ip.h>
@@ -247,3 +248,4 @@
 
 module_init(drr_init);
 module_exit(drr_exit);
+MODULE_LICENSE("GPL");