Relief for retpoline pain

The world is contiuously redoing the same things. I used to do this almost 10 years ago in haproxy ( http://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=531cf0 ) and slightly more than a year ago, when explaining this code to someone, I said "I know it looks strange, this is old, dating when CPUs were not able to predict indirect branches, now we could get rid of this". Then spectre/meltdown arrived and I was very happy not to have touched that code :-)