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Message-ID: <7ade1b4d-71ad-4f32-9b19-9d8eac8e595b@leemhuis.info>
Date:   Thu, 2 Nov 2023 10:13:28 +0100
From:   "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     Chuyi Zhou <zhouchuyi@...edance.com>,
        "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        regressions@...ts.linux.dev,
        Yonghong Song <yonghong.song@...ux.dev>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: mainline build failure due to 9c66dc94b62a ("bpf: Introduce
 css_task open-coded iterator kfuncs")

On 02.11.23 09:53, Chuyi Zhou wrote:
> 在 2023/11/2 16:50, Sudip Mukherjee (Codethink) 写道:

>> The latest mainline kernel branch fails to build mips
>> decstation_64_defconfig,
>> decstation_defconfig and decstation_r4k_defconfig with the error:
>>
>> kernel/bpf/task_iter.c: In function 'bpf_iter_css_task_new':
>> kernel/bpf/task_iter.c:917:14: error: 'CSS_TASK_ITER_PROCS' undeclared
>> (first use in this function)
>>    917 |         case CSS_TASK_ITER_PROCS | CSS_TASK_ITER_THREADED:
>>        |              ^~~~~~~~~~~~~~~~~~~
> [...]
>> git bisect pointed to 9c66dc94b62a ("bpf: Introduce css_task
>> open-coded iterator kfuncs")
> 
> Thanks for the report! This issue has been solved by Jiri.[1]
> 
> [1]:https://lore.kernel.org/all/169890482505.9002.10852784674164703819.git-patchwork-notify@kernel.org/

Thx, I was just about to reply something similar. :-D

Sudip, maybe you know about this already, but in case you don't, here is
a quick tip that might be useful for you: in cases like this it's often
wise to search for earlier reports on lore using an even more
abbreviated commit-id followed by a wildcard (e.g. "9c66dc94*"). That at
least was how I found the fix quickly.

Ciao, Thorsten

#regzbot fix: bpf: fix compilation error without CGROUPS

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