Bug#557439: devtmpfs

[Joey Korkames <joey@kidfixit.com>]

I'm not a Radeon, KMS or external firmware user at all, so I misinterpreted 
the OP's temporary solution. AFAICS, no-one is bundling/modifying udev's 
firmware.c to work against a solely-devtmpfs-populated /dev.

Plus, I think a static module<->firmware list would have to be 
pre-generated and injected into the initramfs (and firmware.c 
be run for each list entry at earlyboot time) to be able to effectively 
ignore starting udev until after radeon/external-firmware-requiring modules 
are modprobed. This is a job that only udevd really does at the moment, so 
maybe it should be run before the manual modprobe list is 
iterated.

http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;f=extras/firmware/firmware.c;hb=HEAD