netdev - Re: [net-next,v2,4/5] seg6: add support for the SRv6 End.DT4 behavior

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Date:   Fri, 13 Nov 2020 20:37:10 -0700
From:   David Ahern <dsahern@...il.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        kernel test robot <lkp@...el.com>,
        Andrea Mayer <andrea.mayer@...roma2.it>,
        "David S. Miller" <davem@...emloft.net>,
        David Ahern <dsahern@...nel.org>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Shrijeet Mukherjee <shrijeet@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        netdev@...r.kernel.org
Subject: Re: [net-next,v2,4/5] seg6: add support for the SRv6 End.DT4 behavior

On 11/13/20 12:00 PM, Nathan Chancellor wrote:
> On Fri, Nov 13, 2020 at 10:05:56AM -0700, David Ahern wrote:
>> On 11/13/20 9:57 AM, Jakub Kicinski wrote:
>>> Good people of build bot, 
>>>
>>> would you mind shedding some light on this one? It was also reported on
>>> v1, and Andrea said it's impossible to repro. Strange that build bot
>>> would make the same mistake twice, tho.
>>>
>>
>> I kicked off a build this morning using Andrea's patches and the config
>> from the build bot; builds fine as long as the first 3 patches are applied.
>>
> 
> I can confirm this as well with clang; if I applied the first three
> patches then this one, there is no error but if you just apply this one,
> there will be. If you open the GitHub URL, it shows just this patch
> applied, not the first three, which explains it.
> 
> For what it's worth, b4 chokes over this series:

Thanks, Nathan. I'll forward to Konstantin.

> 
> $ b4 am -o - 20201107153139.3552-1-andrea.mayer@...roma2.it | git am
> Looking up https://lore.kernel.org/r/20201107153139.3552-1-andrea.mayer%40uniroma2.it
> Grabbing thread from lore.kernel.org/linux-kselftest
> Analyzing 18 messages in the thread
> ---
> Writing /tmp/tmp8425by7fb4-am-stdout
>   [net-next,v2,3/5] seg6: add callbacks for customizing the creation/destruction of a behavior
> ---
> Total patches: 1
> ---
>  Link: https://lore.kernel.org/r/20201107153139.3552-1-andrea.mayer@uniroma2.it
>  Base: not found
> ---
> Applying: seg6: add callbacks for customizing the creation/destruction of a behavior
> error: patch failed: net/ipv6/seg6_local.c:1015
> error: net/ipv6/seg6_local.c: patch does not apply
> Patch failed at 0001 seg6: add callbacks for customizing the creation/destruction of a behavior
> hint: Use 'git am --show-current-patch=diff' to see the failed patch
> When you have resolved this problem, run "git am --continue".
> If you prefer to skip this patch, run "git am --skip" instead.
> To restore the original branch and stop patching, run "git am --abort".
> 
> Even if I grab the mbox from lore.kernel.org, it tries to do the same
> thing and apply the 3rd patch first, which might explain why the 0day
> bot got confused.
> 
> Cheers,
> Nathan
>