net/ipv6/ip6_vti.c:443: warning: No description found for return value of 'vti6_xmit'
net/ipv6/ip6_vti.c:710: warning: No description found for return value of 'vti6_tnl_change'
net/ipv6/ip6_vti.c:925: warning: No description found for return value of 'vti6_dev_init_gen'
net/ipv6/ip6_vti.c:939: warning: No description found for return value of 'vti6_dev_init'
net/ipv6/ip6_vti.c:443: warning: No description found for return value of 'vti6_xmit'
net/ipv6/ip6_vti.c:711: warning: No description found for return value of 'vti6_tnl_change'
net/ipv6/ip6_vti.c:926: warning: No description found for return value of 'vti6_dev_init_gen'
net/ipv6/ip6_vti.c:940: warning: No description found for return value of 'vti6_dev_init'