On Wed, Nov 21, 2018 at 11:22:42AM -0800, Yonghong Song wrote:
> Commit 2993e0515bb4 ("tools/bpf: add support to read .BTF.ext sections")
> added support to read .BTF.ext sections from an object file, create
> and pass prog_btf_fd and func_info to the kernel.
>
> The program btf_fd (prog->btf_fd) is initialized to be -1 to please
> zclose so we do not need special handling dur prog close.
> Passing -1 to the kernel, however, will cause loading error.
> Passing btf_fd 0 to the kernel if prog->btf_fd is invalid
> fixed the problem.
Acked-by: Martin KaFai Lau <ka...@fb.com>
