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    ipvlan: fix building with modular IPV6 · 7f897db3
    Arnd Bergmann authored
    We no longer depend on IPV6, but that now causes a link error with
    CONFIG_IPV6=m and CONFIG_IPVLAN=y:
    
    drivers/net/ipvlan/ipvlan_core.o: In function `ipvlan_queue_xmit':
    ipvlan_core.c:(.text+0x1440): undefined reference to `ip6_route_output_flags'
    drivers/net/ipvlan/ipvlan_core.o: In function `ipvlan_l3_rcv':
    ipvlan_core.c:(.text+0x1818): undefined reference to `ip6_route_input_lookup'
    
    This adds back the dependency on IPV6, with the option of building without
    IPV6, but forcing IPVLAN to be a module when IPV6 is a module.
    
    Fixes: 94333fac
    
     ("ipvlan: drop ipv6 dependency")
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    7f897db3