On Thu, 2018-01-04 at 10:48 +0100, Greg Kroah-Hartman wrote:
> 
> Nice, thanks for the link and the write up.  There is also a patch for
> gcc floating around somewhere, does anyone have the link for that?

http://git.infradead.org/users/dwmw2/gcc-retpoline.git/shortlog/refs/heads/gcc-7_2_0-retpoline-20171219

I put packages for Fedora 27 at ftp://ftp.infradead.org/pub/retpoline/