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

[Alexander Smirnov <asmirnov@ilbers.de>]

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?

Alex