On Fri, Aug 10, 2018 at 5:57 AM Jonathan Corbet [off-list ref] wrote:

The objective actually is to have SPDX tags in all files in the kernel.
That includes documentation, even though people, as always, care less
about the docs than they do the code.

right, but let's do that as a separate patch set.
In the current set I'd focus on reviewing the actual doc changes.
In particular completely removing
Documentation/networking/filter.txt
feels wrong, since lots of websites point directly there.
Can we have at least few words there pointing to new location?