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Date:   Sat, 29 Aug 2020 08:50:42 +0200
From:   Sven Joachim <svenjoac@....de>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Brian Vazquez <brianvv@...gle.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the net-next tree

On 2020-08-28 16:42 -0700, Randy Dunlap wrote:

> On 8/28/20 4:16 PM, Brian Vazquez wrote:
>> On Fri, Aug 28, 2020 at 8:12 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>>>
>>> On 8/28/20 8:09 AM, Sven Joachim wrote:
>>>> On 2020-08-27 11:12 -0700, Brian Vazquez wrote:
>>>>
>>>>> I've been trying to reproduce it with your config but I didn't
>>>>> succeed. I also looked at the file after the preprocessor and it
>>>>> looked good:
>>>>>
>>>>> ret = ({ __builtin_expect(!!(ops->match == fib6_rule_match), 1) ?
>>>>> fib6_rule_match(rule, fl, flags) : ops->match(rule, fl, flags); })
>>>>
>>>> However, in my configuration I have CONFIG_IPV6=m, and so
>>>> fib6_rule_match is not available as a builtin.  I think that's why ld is
>>>> complaining about the undefined reference.
>>>
>>> Same here FWIW. CONFIG_IPV6=m.
>>
>> Oh I see,
>> I tried this and it seems to work fine for me, does this also fix your
>> problem? if so, I'll prepare the patch, and thanks for helping!
>> diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
>> index 51678a528f85..40dfd1f55899 100644
>> --- a/net/core/fib_rules.c
>> +++ b/net/core/fib_rules.c
>> @@ -16,7 +16,7 @@
>>  #include <net/ip_tunnels.h>
>>  #include <linux/indirect_call_wrapper.h>
>>
>> -#ifdef CONFIG_IPV6_MULTIPLE_TABLES
>> +#if defined(CONFIG_IPV6_MULTIPLE_TABLES) && defined(CONFIG_IPV6)
>
>
> Yes, that works for me.
> You can add this to your patch:
>
> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

Works for me as well.

Cheers,
       Sven

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