Re: [PATCH bpf-next v5] selftests/bpf: trace_helpers.c: optimize kallsyms cache

[Rong Tao]

Hi, jirka

Sadly, we can't include libbpf_internal.h in trace_helpers.{h,c}.
we only have the following headers when compile samples/bpf/:

tree of samples/bpf/libbpf/
    +-- bpf_helper_defs.h
    +-- include
    |   '-- bpf
    |       +-- bpf_core_read.h
    |       +-- bpf_endian.h
    |       +-- bpf.h
    |       +-- bpf_helper_defs.h
    |       +-- bpf_helpers.h
    |       +-- bpf_tracing.h
    |       +-- btf.h
    |       +-- libbpf_common.h
    |       +-- libbpf.h
    |       +-- libbpf_legacy.h
    |       +-- libbpf_version.h
    |       +-- skel_internal.h
    |       '-- usdt.bpf.h
    +-- libbpf.a

No libbpf_internal.h here.

What if we add a declaration to libbpf_ensure_mem() in trace_helpers.c?

Good Day,
Rong Tao