> > This compatible isn't in the 5.3 rc series nor is it in linux-next yet.
> > Is this "hot-fix" for the next merge window? Or is this compatible
> > string being generated by firmware somewhere and thus isn't part of the
> > kernel?
> 
> It's on the list and will be in all of the distro v5.3 release kernels.
> 
> https://lkml.org/lkml/2019/9/5/695

And why don't the distro kernels simply pick up this patch, too?