kernel/bpf/syscall.c:4580:2: error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]
kernel/bpf/syscall.c:4580:4: error: expected identifier or '('
kernel/bpf/syscall.c:4583:4: error: expected identifier or '('
kernel/bpf/syscall.c:4589:2: error: expected identifier or '('
kernel/bpf/syscall.c:4621:2: error: expected identifier or '('
kernel/bpf/syscall.c:4623:2: error: expected identifier or '('
kernel/bpf/syscall.c:4624:1: error: extraneous closing brace ('}')