Re: [PATCH v3 bpf-next 06/11] bpf: Add a new kfunc for cgroup1 hierarchy

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On 10/30/23 10:40 PM, Yafang Shao wrote:
> On Mon, Oct 30, 2023 at 9:59 PM Jiri Olsa <olsajiri@xxxxxxxxx> wrote:
>>
>> On Mon, Oct 30, 2023 at 07:35:25PM +0800, Yafang Shao wrote:
>>> On Mon, Oct 30, 2023 at 5:01 PM kernel test robot <lkp@xxxxxxxxx> wrote:
>>>>
>>>> Hi Yafang,
>>>>
>>>> kernel test robot noticed the following build warnings:
>>>>
>>>> [auto build test WARNING on bpf-next/master]
>>>>
>>>> url:    https://github.com/intel-lab-lkp/linux/commits/Yafang-Shao/cgroup-Remove-unnecessary-list_empty/20231029-143457
>>>> base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
>>>> patch link:    https://lore.kernel.org/r/20231029061438.4215-7-laoar.shao%40gmail.com
>>>> patch subject: [PATCH v3 bpf-next 06/11] bpf: Add a new kfunc for cgroup1 hierarchy
>>>> config: i386-randconfig-013-20231030 (https://urldefense.com/v3/__https://download.01.org/0day-ci/archive/20231030/202310301605.CGFI0aSW-lkp@xxxxxxxxx/config__;!!Bt8RZUm9aw!4feH_paRfc92c6DKnIgcbDciELDAOzSoIr66fN3591gkU9ddriq2cqyFm47OezGzvLvXd5Ep4R9ZYmtxrW9dqg$ )
>>>> compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
>>>> reproduce (this is a W=1 build): (https://urldefense.com/v3/__https://download.01.org/0day-ci/archive/20231030/202310301605.CGFI0aSW-lkp@xxxxxxxxx/reproduce__;!!Bt8RZUm9aw!4feH_paRfc92c6DKnIgcbDciELDAOzSoIr66fN3591gkU9ddriq2cqyFm47OezGzvLvXd5Ep4R9ZYmsRR5GsUA$ )
>>>>
>>>> If you fix the issue in a separate patch/commit (i.e. not just a new version of
>>>> the same patch/commit), kindly add following tags
>>>> | Reported-by: kernel test robot <lkp@xxxxxxxxx>
>>>> | Closes: https://lore.kernel.org/oe-kbuild-all/202310301605.CGFI0aSW-lkp@xxxxxxxxx/
>>>>
>>>> All warnings (new ones prefixed by >>):
>>>>
>>>>    kernel/bpf/helpers.c:1893:19: warning: no previous declaration for 'bpf_obj_new_impl' [-Wmissing-declarations]
>>>
>>> -Wmissing-declarations is a known issue and somebody is working on it, right?
>>
>> there's this post [1] from Dave, but seems it never landed
>>
>> jirka
>>
>> [1] https://lore.kernel.org/bpf/20230816150634.1162838-1-void@xxxxxxxxxxxxx/
> 
> Thanks for your information.
> 
> David, I'd appreciate it if you could share an update on its current status
> 

Hi Yafang,

I had a similar patch in a recent series that I was asked to
split out and submit separately. Did so today after seeing this thread: https://lore.kernel.org/bpf/20231030210638.2415306-1-davemarchevsky@xxxxxx/
Sorry, should've CC'd you as well as Jiri on that patch.




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