linux-kernel - Re: [PATCH net-next 2/2] netns: isolate seqnums to use per-netns locks

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Date:   Mon, 23 Apr 2018 12:12:18 +0200
From:   Christian Brauner <christian.brauner@...onical.com>
To:     kbuild-all@...org
Cc:     ebiederm@...ssion.com, davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, avagin@...tuozzo.com,
        ktkhai@...tuozzo.com, serge@...lyn.com, gregkh@...uxfoundation.org
Subject: Re: [PATCH net-next 2/2] netns: isolate seqnums to use per-netns
 locks

On Mon, Apr 23, 2018 at 10:39:50AM +0800, kbuild test robot wrote:
> Hi Christian,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on net-next/master]
> 
> url:    https://github.com/0day-ci/linux/commits/Christian-Brauner/netns-uevent-performance-tweaks/20180420-013717
> config: alpha-alldefconfig (attached as .config)
> compiler: alpha-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=alpha 
> 
> All errors (new ones prefixed by >>):
> 
>    kernel/ksysfs.o: In function `uevent_seqnum_show':
> >> (.text+0x18c): undefined reference to `get_ns_uevent_seqnum_by_vpid'
>    (.text+0x19c): undefined reference to `get_ns_uevent_seqnum_by_vpid'

Right, this happens when CONFIG_NET=n. I am about to send out the second
version of the patch that includes all of the test results in the commit
message and also accounts for kernels compiled without CONFIG_NET.

Thanks!
Christian

> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation