Re: Informations About CAN API of the Linux Kernel

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 03/11/2013 04:34 PM, Kurt Van Dijck wrote:
> On Mon, Mar 11, 2013 at 04:10:12PM +0100, Marc Kleine-Budde wrote:
>> On 03/11/2013 10:29 AM, Kurt Van Dijck wrote:
>>>
>>>
>>> On Fri, Mar 08, 2013 at 01:51:23PM +0100, Robert Schwebel wrote:
>>>> Hi Kurt,
>>>>
>>>> On Fri, Mar 08, 2013 at 11:05:48AM +0100, Kurt Van Dijck wrote:
>>>>> Could I just mark j1939 as "EXPERIMENTAL" in Kconfig.
>>>>> I think that is what I've seen most for 'unstable concepts'.
>>>>
>>>> EXPERIMENTAL is considered to be deprecated and might be removed from
>>>> the kernel, so I wouldn't go down that road. Staging sounds right.
>>>
>>> I see.
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/CodingStyle?id=v3.9-rc2#n549
>>>
>>> Is such thing then appropriate?
>>
>> Does j1939 have a protocol number? Probably.
> Yes. 7.
> 
>> If so, we shouldn't use the
>> "next free" one for an experimental protocol.
> That's another reason to have J1939 merged.
> I would have alerted anyhow when the protocol number 7 got allocated...

Yes, but as soon as you are "officially" using the number 7, you have to
provide a stable API and ABI to the userspace.

Marc
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