编译出现错误，OpenWrt

[phoenixxie0]

net/netfilter/nf_conntrack_ecache.c:136:12: error: '__nf_conntrack_eventmask_report' defined but not used [-Werror=unused-function]
136 | static int __nf_conntrack_eventmask_report(struct nf_conntrack_ecache *e,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[7]: *** [scripts/Makefile.build:289: net/netfilter/nf_conntrack_ecache.o] Error 1
make[6]: *** [scripts/Makefile.build:552: net/netfilter] Error 2
make[5]: *** [Makefile:1906: net] Error 2