netdev - Re: [PATCH bpf-next v2 6/8] cgroup: bpf: enable bpf programs to integrate with rstat

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Date:   Fri, 10 Jun 2022 14:30:00 -0700
From:   Yosry Ahmed <yosryahmed@...gle.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>,
        Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Michal Hocko <mhocko@...nel.org>, kbuild-all@...ts.01.org,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        David Rientjes <rientjes@...gle.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH bpf-next v2 6/8] cgroup: bpf: enable bpf programs to
 integrate with rstat

On Fri, Jun 10, 2022 at 2:23 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi Yosry,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on bpf-next/master]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Yosry-Ahmed/bpf-rstat-cgroup-hierarchical-stats/20220611-034720
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
> config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220611/202206110544.D5cTU0WQ-lkp@intel.com/config)
> compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/intel-lab-lkp/linux/commit/83f297e2b47dc41b511f071b9eadf38339387b41
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Yosry-Ahmed/bpf-rstat-cgroup-hierarchical-stats/20220611-034720
>         git checkout 83f297e2b47dc41b511f071b9eadf38339387b41
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    kernel/cgroup/rstat.c:161:22: warning: no previous prototype for 'bpf_rstat_flush' [-Wmissing-prototypes]
>      161 | __weak noinline void bpf_rstat_flush(struct cgroup *cgrp,
>          |                      ^~~~~~~~~~~~~~~
> >> kernel/cgroup/rstat.c:509:10: error: 'const struct btf_kfunc_id_set' has no member named 'sleepable_set'; did you mean 'release_set'?
>      509 |         .sleepable_set  = &bpf_rstat_sleepable_kfunc_ids,
>          |          ^~~~~~~~~~~~~
>          |          release_set
>    kernel/cgroup/rstat.c:509:27: warning: excess elements in struct initializer
>      509 |         .sleepable_set  = &bpf_rstat_sleepable_kfunc_ids,
>          |                           ^
>    kernel/cgroup/rstat.c:509:27: note: (near initialization for 'bpf_rstat_kfunc_set')
>
>
> vim +509 kernel/cgroup/rstat.c
>
>    505
>    506  static const struct btf_kfunc_id_set bpf_rstat_kfunc_set = {
>    507          .owner          = THIS_MODULE,
>    508          .check_set      = &bpf_rstat_check_kfunc_ids,
>  > 509          .sleepable_set  = &bpf_rstat_sleepable_kfunc_ids,
>    510  };
>    511
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp

AFAICT these failures are because the patch series depends on a patch
in the mailing list [1] that is not in bpf-next, as explained by the
cover letter.

[1] https://lore.kernel.org/bpf/20220421140740.459558-5-benjamin.tissoires@redhat.com/