r278857: buildkernel failure: pf_norm.c:1098:1: error: no previous prototype for function 'pf_refragment6'

awk -f /usr/src/sys/conf/kmod_syms.awk ng_ksocket.ko  export_syms | xargs -J% objcopy %
ng_ksocket.ko objcopy --strip-debug ng_ksocket.ko
===> netgraph/l2tp (all)
--- ng_l2tp.o ---
cc  -O2 -pipe -O3 -O3 -pipe -march=native  -fno-strict-aliasing -Werror -D_KERNEL
-DKLD_MODULE -nostdinc   -DHAVE_KERNEL_OPTION_HEADERS
-include /usr/obj/usr/src/sys/THOR/opt_global.h -I. -I/usr/src/sys
-I/usr/src/sys/contrib/altq -fno-common  -fno-omit-frame-pointer
-mno-omit-leaf-frame-pointer -I/usr/obj/usr/src/sys/THOR  -mcmodel=kernel -mno-red-zone
-mno-mmx -mno-sse -msoft-float  -fno-asynchronous-unwind-tables -ffreestanding -fwrapv
-fstack-protector -Wno-error-tautological-compare -Wno-error-empty-body
-Wno-error-parentheses-equality -Wno-error-unused-function  -Wno-error-pointer-sign -Wall
-Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes
-Wpointer-arith -Winline -Wcast-qual  -Wundef -Wno-pointer-sign -fformat-extensions
-Wmissing-include-dirs -fdiagnostics-show-option  -Wno-unknown-pragmas
-Wno-error-tautological-compare -Wno-error-empty-body  -Wno-error-parentheses-equality
-Wno-error-unused-function  -Wno-error-pointer-sign  -mno-aes -mno-avx  -std=iso9899:1999
-c /usr/src/sys/modules/netgraph/l2tp/../../../netgraph/ng_l2tp.c --- all_subdir_pf
--- /usr/src/sys/modules/pf/../../netpfil/pf/pf_norm.c:1098:1: error: no previous
prototype for function 'pf_refragment6' [-Werror,-Wmissing-prototypes]
pf_refragment6(struct ifnet *ifp, struct mbuf **m0, struct m_tag *mtag) ^ 1 error
generated. *** [pf_norm.o] Error code 1

make[4]: stopped in /usr/src/sys/modules/pf
1 error

make[4]: stopped in /usr/src/sys/modules/pf
*** [all_subdir_pf] Error code 2