netdev - "resolve_btfids: unresolved" warnings while building v5.16-rc1

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Date:   Mon, 15 Nov 2021 16:34:51 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     memxor@...il.com, ast@...nel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: "resolve_btfids: unresolved" warnings while building v5.16-rc1

Hi, net/bpf developers!

While building newest kernel for fuzzing I met following warnings:

```
   BTFIDS  vmlinux
WARN: resolve_btfids: unresolved symbol tcp_dctcp_kfunc_ids
WARN: resolve_btfids: unresolved symbol tcp_cubic_kfunc_ids
WARN: resolve_btfids: unresolved symbol tcp_bbr_kfunc_ids
   SORTTAB vmlinux

```

I haven't seen such warnings before and have no idea are they important 
or not. Config is attached.

My host is openSUSE Tumbleweed with gcc (SUSE Linux) 10.3.1 20210707 
[revision 048117e16c77f82598fca9af585500572d46ad73] if it's important :)



With regards,
Pavel Skripkin
Download attachment ".config" of type "application/x-config" (225751 bytes)