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Re: [PATCH v2] compat: deal with backported codel

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On Mon, Aug 6, 2012 at 2:45 PM, Hauke Mehrtens <hauke@xxxxxxxxxx> wrote:
> On 08/06/2012 10:33 PM, Hauke Mehrtens wrote:
>> On 08/06/2012 09:53 PM, Luis R. Rodriguez wrote:
>>> On Sun, Aug 5, 2012 at 3:29 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
>>>> From: Johannes Berg <johannes.berg@xxxxxxxxx>
>>>>
>>>> Some distro kernels (in particular the Debian 3.2.0-3
>>>> kernel I'm running) backport codel already, so trying
>>>> to backport it again causes issues. Protect the compat
>>>> backport with #ifdef TCA_CODEL_MAX.
>>>>
>>>> Also link the flow_dissector code into the codel module
>>>> which then won't be loaded on kernels that already have
>>>> codel backported.
>>>>
>>>> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
>>>
>>> Applied and pushed, thanks!
>>>
>>>   Luis
>>>
>> This breaks my build if net/codel.h is not in the kernel headers:
>>
>> In file included from
>> /home/hauke/compat-wireless/compat-wireless/compat/sch_fq_codel_core.c:27:0:
>> /home/hauke/compat-wireless/compat-wireless/include/net/codel.h:5:28:
>> fatal error: net/codel.h: No such file or directory
>> compilation terminated.
>>
>> TCA_CODEL_MAX is defined in include/linux/compat-3.5.h and this file is
>> included ever time, so the check around #include_next <net/codel.h> is
>> never false.
>>
>> You could define something like COMPAT_CODEL_BACKPORT in
>> include/linux/compat-3.5.h and extend the check in include/net/codel.h
>> that this has to be unset.
>>
>> Hauke
>
> With the attached patch in addition to Johannes' patch it works for me.
> Anyone feel free to integrate it or use it in any other way.

I've merged the two patches together and applied, thanks! Also
throwing this into the linux-3.5.y branch.

  Luis
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