On Wed, 2024-01-17 at 14:33 -0800, Andrii Nakryiko wrote: [...] > diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c > index c5a42ac309fd..61db92189517 100644 > --- a/tools/lib/bpf/libbpf.c > +++ b/tools/lib/bpf/libbpf.c > @@ -6757,6 +6757,69 @@ static int clone_func_btf_info(struct btf *btf, int orig_fn_id, struct bpf_progr > return fn_id; > } > > +static int probe_kern_arg_ctx_tag(void) [...] > + btf_fd = libbpf__load_raw_btf((char *)types, sizeof(types), strs, sizeof(strs)); > + if (btf_fd < 0) > + return 0; Question: suppose this is an old kernel and decl tags are not supported, should negative result be cached as 0 in such case? [...]
