Comment 6 for bug 1999670

Thank you @gesimu for your feedback.

I can also confirm that it can be built for both generic 5.15 and hwe 5.19 kernels:

=========================================================
Setting up v4l2loopback-dkms (0.12.7-2ubuntu2~22.04.1) ...
Loading new v4l2loopback-0.12.7 DKMS files...
Building for 5.15.0-60-generic 5.19.0-32-generic
Building initial module for 5.15.0-60-generic
EFI variables are not supported on this system
/sys/firmware/efi/efivars not found, aborting.
Done.

v4l2loopback.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/5.15.0-60-generic/updates/dkms/

depmod....
Building initial module for 5.19.0-32-generic
EFI variables are not supported on this system
/sys/firmware/efi/efivars not found, aborting.
Done.

v4l2loopback.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/5.19.0-32-generic/updates/dkms/

depmod....
=========================================================