netdev - Re: linux-next failing build due to missing cubictcp

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Date:   Wed, 5 May 2021 15:56:12 +0200
From:   Michal Suchánek <msuchanek@...e.de>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Yonghong Song <yhs@...com>, linux-kernel@...r.kernel.org,
        Martin KaFai Lau <kafai@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Jiri Slaby <jslaby@...e.com>
Subject: Re: linux-next failing build due to missing cubictcp_state symbol

On Mon, Apr 26, 2021 at 09:16:36PM +0200, Jiri Olsa wrote:
> On Mon, Apr 26, 2021 at 06:03:19PM +0200, Jiri Olsa wrote:
> > On Mon, Apr 26, 2021 at 08:41:49AM -0700, Yonghong Song wrote:
> > >
> > >
> > > On 4/26/21 5:14 AM, Michal Suchánek wrote:
> > > > On Mon, Apr 26, 2021 at 02:12:20PM +0200, Michal Suchánek wrote:
> > > > > On Mon, Apr 26, 2021 at 01:32:15PM +0200, Michal Suchánek wrote:
> > > > > > On Sun, Apr 25, 2021 at 01:15:45PM +0200, Michal Suchánek wrote:
> > > > > > > On Fri, Apr 23, 2021 at 07:55:28PM +0200, Michal Suchánek wrote:
> > > > > > > > On Fri, Apr 23, 2021 at 07:41:29AM -0700, Yonghong Song wrote:
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > On 4/23/21 6:05 AM, Michal Suchánek wrote:
> > > > > > > > > > Hello,
> > > > > > > > > >
> > > > > > > > > > I see this build error in linux-next (config attached).
> > > > > > > > > >
> > > > > > > > > > [ 4939s]   LD      vmlinux
> > > > > > > > > > [ 4959s]   BTFIDS  vmlinux
> > > > > > > > > > [ 4959s] FAILED unresolved symbol cubictcp_state
> > > > > > > > > > [ 4960s] make[1]: ***
> > > > > > > > > > [/home/abuild/rpmbuild/BUILD/kernel-vanilla-5.12~rc8.next.20210422/linux-5.12-rc8-next-20210422/Makefile:1277:
> > > > > > > > > > vmlinux] Error 255
> > > > > > > > > > [ 4960s] make: *** [../Makefile:222: __sub-make] Error 2
> >
> > this one was reported by Jesper and was fixed by upgrading pahole
> > that contains the new function generation fixes (v1.19)

It needs pahole 1.21 here, 1.19 was not sufficient. Even then it
regressed again after 5.12 on arm64:

  LD      vmlinux
ld: warning: -z relro ignored
  BTFIDS  vmlinux
FAILED unresolved symbol cubictcp_state
make[1]: *** [/home/abuild/rpmbuild/BUILD/kernel-vanilla-5.12.0.13670.g5e321ded302d/linux-5.12-13670-g5e321ded302d/Makefile:1196: vmlinux] Error 255
make: *** [../Makefile:215: __sub-make] Error 2

Any idea what might be wrong with arm64?

Thanks

Michal

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