I authored this document on the Linux Device Driver model 11 years ago and amazingly it still represents the current policy: https://www.linuxfoundation.org/eve

I authored this document on the Linux Device Driver model 11 years ago and amazingly it still represents the current policy: https://www.linuxfoundation.org/events/2008/06/the-linux-driver-model-a-better-way-to-support-devices/ https://www.linuxfoundation.org/events/2008/06/the-linux-dri... Specifically, the Linux kernel maintainers, not the Linux Foundation, determine the policy that the user space ABI remains stable while the device driver API is unstable. Disclosure: I work for the Linux Foundation, and I know that if we told the kernel maintainers to change their policy they would laugh at us.