The funny? Tonight I got an incoming bug fix from a user who had caught that libmemcached had the old code in it, which of course... I had copied out of the header code in the Linux kernel.
Go look in my_global.h in the MySQL include/ directory.
Same bloody mistake!
Copy and Paste bugs.... got to love them!
(FWIW, I checked, neither Postgres or Apache have the hack, so they are free of this). The post I reference from lkml is quite old... I should read up on this and see what the history of this is. There is probably more here then meets the eye.