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Description of problem:
The command fails:

mount -n -o fscontext=system_u:object_r:device_t,mode=0755 -t tmpfs
none /dev/

mount: wrong fs type, bad option, bad superblock on none,
       or too many mounted file systems

Kernel is 2.6.6 without selinux; not a fedora kernel. I am not sure
what the fscontext option is doing at all. I am suspecting that this
is something with selinux.

I am not sure if it is required to run a selinux kernel...

Version-Release number of selected component (if applicable):
udev-032-2

How reproducible:
Always

Steps to Reproduce:
1. /sbin/start_udev
2. ????
3. mount error
    

Additional info: