Hi Andrew

Thanks you response! I already fixed the issue. 
I download the linux source code form "https://github.com/openbmc/linux <https://github.com/openbmc/linux>”, and replace the kernel path on file "meta-aspeed/recipes-kernel/linux/linux-aspeed.inc”. Now I can build the out of tree module and install to my machine.

BR
Paul


> Andrew Jeffery <andrew@aj.id.au> 於 2021年8月3日 下午7:42 寫道：
> 
> 
> 
> On Mon, 2 Aug 2021, at 19:31, 吳秉昌 wrote:
>> Hi teams
>> 
>> Today, I try to install SDK, I can build and run "hello world”, but I 
>> still can’t build the hello-mod module.
>> Please give me some suggestions. Many thanks!
> 
> I'm not aware of anyone else in the OpenBMC community developing kernel 
> modules this way, which might be why you haven't got many responses.
> 
> My approach is just to work on the kernel directly (i.e. clone the 
> kernel sources and add your code to the appropriate locations). Is this 
> something that you can try?
> 
> Andrew