API between modules

[Greg KH]

On Thu, May 18, 2023 at 08:16:18AM +0100, Lucas Tanure wrote:
> Hi,
> 
> I have two kernel modules that need to talk over an API, and right
> now, they are statically linked together, but I am looking for a
> better way to separate them and share an API between them.
> 
> A few years ago, I did the HDA component:
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/sound/pci/hda/hda_component.h
> 
> Using the component API:
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/include/linux/component.h
> 
> Are there other ways for a module to wait for another module to load
> and use its API?
> Is there a default way to do that?

Yes, just call a function in that other module and it will be loaded
properly before your module can call it.  That's how all in-kernel apis
work.

thanks,

greg k-h