net/ipv6/ip6_tunnel.c:1875: warning: No description found for return value of 'ip6_tnl_dev_init_gen'
net/ipv6/ip6_tunnel.c:1918: warning: No description found for return value of 'ip6_tnl_dev_init'
net/ipv6/ip6_tunnel.c:1875: warning: No description found for return value of 'ip6_tnl_dev_init_gen'
net/ipv6/ip6_tunnel.c:1918: warning: No description found for return value of 'ip6_tnl_dev_init'