On 2/27/19 9:46 PM, Dan Carpenter wrote:
> The "ref_type_id" variable needs to be signed for the error handling
> to work.
>
> Fixes: d5caef5b5655 ("btf: add BTF types deduplication algorithm")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> This goes through the BPF tree probably, although it does apply to
> net-next.
>
> tools/lib/bpf/btf.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
> index 68b50e9bbde1..8faed5386124 100644
> --- a/tools/lib/bpf/btf.c
> +++ b/tools/lib/bpf/btf.c
> @@ -2326,7 +2326,8 @@ static int btf_dedup_ref_type(struct btf_dedup *d, __u32 type_id)
> struct btf_type *t, *cand;
> /* if we don't find equivalent type, then we are representative type */
> __u32 new_id = type_id;
> - __u32 h, ref_type_id;
> + __u32 h; > + int ref_type_id;
nit. Maybe you can change to
int ref_type_id;
__u32 h;
to maintain kernel declaration reverse christmas tree convention?
>
> if (d->map[type_id] == BTF_IN_PROGRESS_ID)
> return -ELOOP;
>
