[yocto] Docs help - proper way of adding a userspace header for the kernel

[Paul Eggleton]

Hi folks,

Would someone be able to help Scott with the background for this:

  https://bugzilla.yoctoproject.org/show_bug.cgi?id=8596

It's not really my area of expertise and we really want this documented 
properly once and for all.

Thanks,
Paul

-- 
Paul Eggleton
Intel Open Source Technology Centre