On Tue, Dec 05, 2017 at 09:58:54AM +0900, Masahiro Yamada wrote:

> Indeed ugly,
> but I think this is intentional to make the SPDX line stand out.

> 
> Linus suggested this as far as I understood from the following:
> https://patchwork.kernel.org/patch/10016201/

> If you use C++ comment style for the entire block,
> it will not stand out.

It's the first line of the file to make it stand out, if you google
around you can find some other conversation about how C++ comments are
a good idea in general and this might encourage them.