Don't make this visible to userspace

Posted May 8, 2018 2:39 UTC (Tue) by ebiederm (subscriber, #35028)
Parent article: Shared memory mappings for devices

This sounds like yet another darn global id that someone is going to make visible to userspace
and then it will need to get namespaced and then it's utility for device drivers will be gone.

So be very careful and don't even consider making something like this visible to userspace unless you intend to make it globally unique and even then hesitate and make absolutely certain that is what you want.