../net/ipv6/seg6_iptunnel.c: note: in included file (through ../include/linux/seg6_iptunnel.h): ../include/uapi/linux/seg6_iptunnel.h:29:31: warning: array of flexible structures ../net/ipv6/seg6_iptunnel.c:52:43: warning: array of flexible structures ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?