../kernel/bpf/hashtab.c: note: in included file (through ../include/linux/workqueue.h, ../include/linux/bpf.h): ../include/linux/rcupdate.h:880:25: warning: context imbalance in 'bpf_hash_map_seq_find_next' - unexpected unlock ../include/linux/rcupdate.h:880:25: warning: context imbalance in 'bpf_hash_map_seq_stop' - unexpected unlock ../kernel/bpf/stackmap.c:490:9: 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:490:9: warning: context imbalance in '__bpf_get_stack' - different lock contexts for basic block ../kernel/bpf/hashtab.c: note: in included file (through ../include/linux/workqueue.h, ../include/linux/bpf.h): ../include/linux/rcupdate.h:880:25: warning: context imbalance in 'bpf_hash_map_seq_find_next' - unexpected unlock ../include/linux/rcupdate.h:880:25: warning: context imbalance in 'bpf_hash_map_seq_stop' - unexpected unlock ../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?