ERRCODE_OFFSET     17 tools/lib/bpf/libbpf_errno.c #define ERRCODE_OFFSET(c)	ERRNO_OFFSET(LIBBPF_ERRNO__##c)
ERRCODE_OFFSET   1613 tools/perf/util/bpf-loader.c #define ERRCODE_OFFSET(c)	ERRNO_OFFSET(BPF_LOADER_ERRNO__##c)