../net/netfilter/nf_flow_table_ip.c: note: in included file (through ../include/linux/if_pppox.h, ../include/net/netfilter/nf_flow_table.h): ../include/uapi/linux/if_pppox.h:153:29: warning: array of flexible structures ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static? ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static? ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?