../kernel/bpf/stackmap.c:508:9: warning: context imbalance in '__bpf_get_stack' - different lock contexts for basic block ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static? ../kernel/bpf/stackmap.c:512:9: warning: context imbalance in '__bpf_get_stack' - different lock contexts for basic block ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?