[PATCH bpf] bpftool: fix BTF raw dump of FWD's fwd_kind

[Andrii Nakryiko]

kflag bit determines whether FWD is for struct or union. Use that bit.

Fixes: c93cc69004df ("bpftool: add ability to dump BTF types")
Signed-off-by: Andrii Nakryiko <andr...@fb.com>
---
 tools/bpf/bpftool/btf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 58a2cd002a4b..7317438ecd9e 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -208,8 +208,8 @@ static int dump_btf_type(const struct btf *btf, __u32 id,
                break;
        }
        case BTF_KIND_FWD: {
-               const char *fwd_kind = BTF_INFO_KIND(t->info) ? "union"
-                                                             : "struct";
+               const char *fwd_kind = BTF_INFO_KFLAG(t->info) ? "union"
+                                                              : "struct";
 
                if (json_output)
                        jsonw_string_field(w, "fwd_kind", fwd_kind);
-- 
2.17.1