Adding the BT driver

Adding the BT driver

[AceLan Kao]

Hi all,

I'm working on adding BT driver back to linux backport driver, and got
some questions.
1. Do we still do building the backport driver against all the
supported kernels? I didn't see those reports in git log recently, so
I'm wondering while backporting BT driver, can I skip some old
kernels' support.
2. Is there a script that can help me to build the backport driver
against certain kernels?
3. Is there anything I should take care of while doing the BT backport?
Thanks.

Best regards,
AceLan Kao.
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Re: Adding the BT driver

[Arend van Spriel]

On 7/13/2017 5:07 AM, AceLan Kao wrote:
> Hi all,
>
> I'm working on adding BT driver back to linux backport driver, and got
> some questions.

I suppose it means you also want to maintain BT support in backports 
project?

> 1. Do we still do building the backport driver against all the
> supported kernels? I didn't see those reports in git log recently, so
> I'm wondering while backporting BT driver, can I skip some old
> kernels' support.

Well. You could limit the earliest kernel by adding a dependency in the 
dependencies file.

> 2. Is there a script that can help me to build the backport driver
> against certain kernels?

Not really. You just run make from the backports package and provide 
KLIB_BUILD=... on the command line referring to the target kernel headers.

> 3. Is there anything I should take care of while doing the BT backport?

I forgot the reason for dropping BT. Don't think it was anything 
technical. I guess there was nobody willing to put effort in it.

Regards,
Arend
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Re: Adding the BT driver

[Luis R. Rodriguez]

On Thu, Jul 13, 2017 at 11:21:36AM +0200, Arend van Spriel wrote:
> On 7/13/2017 5:07 AM, AceLan Kao wrote:
> > Hi all,
> > 
> > I'm working on adding BT driver back to linux backport driver, and got
> > some questions.
> 
> I suppose it means you also want to maintain BT support in backports
> project?

Which has me thinking perhaps the policy we need is a MAINTAINERS.backport file
or something?

> > 1. Do we still do building the backport driver against all the
> > supported kernels? I didn't see those reports in git log recently, so
> > I'm wondering while backporting BT driver, can I skip some old
> > kernels' support.
> 
> Well. You could limit the earliest kernel by adding a dependency in the
> dependencies file.
> 
> > 2. Is there a script that can help me to build the backport driver
> > against certain kernels?
> 
> Not really. You just run make from the backports package and provide
> KLIB_BUILD=... on the command line referring to the target kernel headers.

There is documentation:

https://backports.wiki.kernel.org/index.php/Documentation/backports/hacking#Adding_new_driver

I updated it recently as I demo'd adding yet-another new subsystem (not
upstream, nor patches posted).

  Luis
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Re: Adding the BT driver

[AceLan Kao]

2017-07-14 1:28 GMT+08:00 Luis R. Rodriguez <mcgrof@kernel.org>:
> On Thu, Jul 13, 2017 at 11:21:36AM +0200, Arend van Spriel wrote:
>> On 7/13/2017 5:07 AM, AceLan Kao wrote:
>> > Hi all,
>> >
>> > I'm working on adding BT driver back to linux backport driver, and got
>> > some questions.
>>
>> I suppose it means you also want to maintain BT support in backports
>> project?
>
> Which has me thinking perhaps the policy we need is a MAINTAINERS.backport file
> or something?

Yes, I'm willing to maintain bt subsystem.

>
>> > 1. Do we still do building the backport driver against all the
>> > supported kernels? I didn't see those reports in git log recently, so
>> > I'm wondering while backporting BT driver, can I skip some old
>> > kernels' support.
>>
>> Well. You could limit the earliest kernel by adding a dependency in the
>> dependencies file.
>>

got it, will try to run ckmake to check how far I can do

>> > 2. Is there a script that can help me to build the backport driver
>> > against certain kernels?
>>
>> Not really. You just run make from the backports package and provide
>> KLIB_BUILD=... on the command line referring to the target kernel headers.
>
> There is documentation:
>
> https://backports.wiki.kernel.org/index.php/Documentation/backports/hacking#Adding_new_driver
>
> I updated it recently as I demo'd adding yet-another new subsystem (not
> upstream, nor patches posted).
Thanks, I'll check the steps carefully to make sure I didn't missing anything.

>
>   Luis
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