[maemo-developers] Community Kernels garage project created

[From: Marcio Macedo]

Hi,

On Tue, Jul 15, 2008 at 12:20 PM, Jason Edgecombe
<jason at rampaginggeek.com> wrote:
> Graham Cobb wrote:
>> On Tuesday 15 July 2008 09:25:36 Frantisek Dufka wrote:
>>
>>> Primary goal is to accumulate kernel patches so they do not get lost,
>>> secondary goal is to build kernel images for all devices and latest
>>> versions of all IT200x releases. Patches should primarily apply to
>>> kernel sources release in Maemo SDK (i.e not current linux-omap).
>>>
>>
>> Do you see this also addressing the related issue of building and distributing
>> kernel modules?
>>
>> I have a package (sisusbvga) which contains a kernel module (to drive an
>> external VGA adapter).  At the moment, I have built the kernel module using
>> the instructions on the wiki and then I package it up as a binary blob -- in
>> other words the debian package does NOT build the module from source.  If
>> possible, I would like to change that so that the debian package builds the
>> module, in the autobuilder.
>>
>> Actually in my case the situation may be reasonably straightforward: the
>> sisusbvga driver is actually part of the standard Linux kernel, although a
>> patch is required to get it to build for the Internet Tablet (I ought to
>> submit the patch to LKML one day).  So, I guess it falls within the scope of
>> this project anyway, assuming you are addressing the problem of kernel
>> modules as well as the kernel image itself.
>>
>> There are another couple of issues -- are they part of this project?
>>
>> Firstly, as it stands today, I can't find a way to install the module such
>> that it can be found and loaded automatically when the hardware is seen on
>> boot: /lib/modules is only in the initfs.
>>
>> The other problem is how to deal with kernel versions.  I believe the plan for
>> Maemo going forward is that even kernel upgrades may occur.  What package do
>> I specify as a dependency so that my package only installs on the correct
>> kernel version?  How do I get the autobuilder to build the various versions
>> of my module needed for the different kernel versions?  What magic do I need
>> to put in my debian/control to get the installer to install the correct
>> version of my module for the kernel version?
>>
> I have a similar issue where I have to maintain the openafs kernel
> modules, but I am trying to get them to automatically build in the
> autobuilder. my module lives in a odd folder and is loaded by the init.d
> script so loading is taken care of. I will continue to maint the openafs
> kernel module along with the openafs package.

The fuse module, from the package fuse-modules-rx-34 is installed at
/lib/modules/2.6.21-omap1/extra/fuse.ko
and it is loaded by the default kernel.

I didn't find a good solution for building kernel modules in
autobuilder, except building the whole kernel first.
I don't have much experience with kernel modules, but maybe there's a
way of avoiding compiling the kernel every time I want to build a
single module.

Maybe someone with more experience building modules can give some hints.

Marcio

> Jason
> _______________________________________________
> maemo-developers mailing list
> maemo-developers at maemo.org
> https://lists.maemo.org/mailman/listinfo/maemo-developers
>