On Wed, Jun 12, 2019 at 04:47:15PM +0800, YueHaibing wrote: > If CONFIG_IPV6 is not set, building fails: > > net/bridge/netfilter/nf_conntrack_bridge.o: In function `nf_ct_bridge_pre': > nf_conntrack_bridge.c:(.text+0x41c): undefined symbol `nf_ct_frag6_gather' > net/bridge/netfilter/nf_conntrack_bridge.o: In function `nf_ct_bridge_post': > nf_conntrack_bridge.c:(.text+0x820): undefined symbol `br_ip6_fragment' Applied, thanks for explaining.