Sign-off-by, see http://linuxbios.org/Development_Guidelines#Sign-off_Procedure
Signed-off-by: even.
As far as the GPL headers go, should everyone who's ever made a change to that file be included? I'm assuming yes, and working on straightening it out.
Only people who made substantive, non-mechanical changes need to be listed, other changes aren't copyrightable anyway. You can of course list everyone anyway, heh.
Segher