Re: [PATCH v5 0/5] Provide infrastructure and examples for custom kernels and modules

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2018-02-15 16:04, Alexander Smirnov wrote:
> 
> 
> On 02/15/2018 06:00 PM, Jan Kiszka wrote:
>> On 2018-02-15 15:43, Alexander Smirnov wrote:
>>> On 02/14/2018 12:13 PM, Jan Kiszka wrote:
>>>> This is now finally the promised patches to provide simple patterns for
>>>> building custom kernels for Isar images that replace the distro
>>>> kernels.
>>>> It also provids the same pattern for custom out-of-tree kernel modules.
>>>>
>>>> Changes in v5:
>>>>    - dropped merged patches
>>>>    - reworked kernel packages naming and selection mechanism to use
>>>>      flavor/arch rather them overwriting upstream names
>>>>    - fixed rebuilds of the kernel (.version was causing problems)
>>>>    - moved kernel build into script - and switched back to include
>>>> pattern
>>>>    - provided note on origin of exemplary defconfig
>>>>    - add KERNEL_DEFCONFIG variable
>>>>
>>>> Jan
>>>
>>> $ start_vm -a arm -d jessie
>>>
>>> ...
>>>
>>> root@isar:~# modprobe example-module
>>> [  110.444107] Just an example
>>> modprobe: ERROR: could not insert 'example_module': No anode
>>>
>>>
>>> The same for amd64:
>>>
>>>
>>> root@isar:~# modprobe example-module
>>> [   38.343926] example_module: loading out-of-tree module taints kernel.
>>> [   38.353140] Just an example
>>> modprobe: ERROR: could not insert 'example_module': No anode
>>>
>>> Please take a look.
>>>
>>
>> static int __init example_module_init(void)
>> {
>>          printk("Just an example\n");
>>          return -ENOANO;
>> }
>>
>> module_init(example_module_init);
>>
>> :)
>>
> 
> Ouch, didn't notice this. :-(
> 
> Do you have any specific reason to have module_init failed? Could we
> have zero return code to test its probe-ability and loading-by-default
> for CI?

I didn't think of CI for this module yet, but that may make more sense
then. Do you plan to write some CI script for that? Then just change the
module code to your needs. It's "just an example". :)

Jan

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