It seems that there is work to get rid of the absurd and detrimental copyright assignment requirement.
Linus Torvalds on Google+:
"one of my (really old) experiences was that even if the patch were to have been acceptable in other ways, glibc required the insane FSF copyright assignment paperwork. Is that also gone?"
David Miller replies:
"This is a known issue and people at various levels are trying to get this sorted out in one way or another. I'm never on top of this since I've had paperwork with the FSF my entire career, and therefore it's never been an issue for me."
"Without going into specifics, the FSF is looking into ways to accommodate this kind of situation, for all projects."