On Wed, Feb 19, 2020 at 10:27 PM Andrii Nakryiko <andriin@xxxxxx> wrote:
>
> If BPF program is using BTF-defined maps, BTF is required only for
> libbpf itself to process map definitions. If after that BTF fails to
> be loaded into kernel (e.g., if it doesn't support BTF at all), this
> shouldn't prevent valid BPF program from loading. Existing
> retry-without-BTF logic for creating maps will succeed to create such
> maps without any problems. So, presence of .maps section shouldn't make
> BTF required for kernel. Update the check accordingly.
>
> Validated by ensuring simple BPF program with BTF-defined maps is still
> loaded on old kernel without BTF support and map is correctly parsed and
> created.
>
> Fixes: abd29c931459 ("libbpf: allow specifying map definitions using BTF")
> Reported-by: Julia Kartseva <hex@xxxxxx>
> Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
Applied. Thanks
