The input/joystick/gamecon driver as of 2.6.9-gentoo-r9 segfaults on insmod. This is a known bug in this driver, see http://rufus.hackish.org/wiki/gamecon for details and patch. I think the patch should be included in gentoo-dev-kernel.
Is the patch submitted to the main kernel.org tree? Is it already in the 2.6.10-rc3 kernel? If so, please reopen this bug and attach the patch you want to have applied. If not, please pester the developer to get the patch accepted upstream.
The page says the patch is accepted by Vojtech Pavlik (kernel input maintainer IIRC), but isn't in kernel yet. It's still true, it's not even in the bitkeeper repository yet. That being said, the patch itself is a simple 3-line fix and does fix a fatal error. Please consider applying it or otherwise re-close the bug.
Created attachment 45393 [details, diff] the patch in question
Created attachment 45394 [details, diff] the patch modified to apply cleanly on 2.6.9-r9
Would like to see this in Linus's tree first.. please reopen when it appears in BK