The kdev_none change might not be correct, please check.  It's the place
in sysrq where the code immediately above syncs local disks, and then
syncs non-local disks.  The better change might be to simply remove the
second check altogether, instead of changing it as I have done.
-- 
Jeff Garzik      | Only so many songs can be sung
Building 1024    | with two lips, two lungs, and one tongue.
MandrakeSoft     |         - nomeansno