../kernel/bpf/core.c:243:49: error: arithmetics on pointers to functions
../kernel/bpf/core.c:2891:29: warning: symbol 'bpf_seq_printf_btf_proto' was not declared. Should it be static?
../kernel/bpf/core.c: note: in included file (through ../include/trace/trace_events.h, ../include/trace/define_trace.h, ../include/trace/events/xdp.h, ../include/linux/bpf_trace.h):
../include/trace/events/xdp.h:321:1: warning: Using plain integer as NULL pointer
../include/trace/events/xdp.h:348:1: warning: Using plain integer as NULL pointer
../include/trace/events/xdp.h:382:1: warning: Using plain integer as NULL pointer
../kernel/bpf/core.c: note: in included file (through ../include/linux/rbtree_latch.h, ../include/linux/bpf.h, ../include/linux/filter.h):
../include/linux/rbtree.h:74:9: error: incompatible types in comparison expression (different address spaces):
../include/linux/rbtree.h:74:9:    struct rb_node [noderef] __rcu *
../include/linux/rbtree.h:74:9:    struct rb_node *
../include/linux/rbtree.h:74:9: error: incompatible types in comparison expression (different address spaces):
../include/linux/rbtree.h:74:9:    struct rb_node [noderef] __rcu *
../include/linux/rbtree.h:74:9:    struct rb_node *
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/rnull_mod.o
../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?
../kernel/bpf/core.c:243:49: error: arithmetics on pointers to functions
../kernel/bpf/core.c:2895:29: warning: symbol 'bpf_seq_printf_btf_proto' was not declared. Should it be static?
../kernel/bpf/core.c: note: in included file (through ../include/trace/trace_events.h, ../include/trace/define_trace.h, ../include/trace/events/xdp.h, ../include/linux/bpf_trace.h):
../include/trace/events/xdp.h:321:1: warning: Using plain integer as NULL pointer
../include/trace/events/xdp.h:348:1: warning: Using plain integer as NULL pointer
../include/trace/events/xdp.h:382:1: warning: Using plain integer as NULL pointer
../kernel/bpf/core.c: note: in included file (through ../include/linux/rbtree_latch.h, ../include/linux/bpf.h, ../include/linux/filter.h):
../include/linux/rbtree.h:74:9: error: incompatible types in comparison expression (different address spaces):
../include/linux/rbtree.h:74:9:    struct rb_node [noderef] __rcu *
../include/linux/rbtree.h:74:9:    struct rb_node *
../include/linux/rbtree.h:74:9: error: incompatible types in comparison expression (different address spaces):
../include/linux/rbtree.h:74:9:    struct rb_node [noderef] __rcu *
../include/linux/rbtree.h:74:9:    struct rb_node *
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/block/rnull_mod.o
../arch/x86/boot/version.c:18:12: warning: symbol 'kernel_version' was not declared. Should it be static?