bug#21664: tail: unrecognized file system type 0x62656570

[Benny Halevy]

I'm developing a kernel module that is registered as a configfs 
subsystem. When running tail -f on one of the pseudo-files I get the 
following error:

# tail -f /config/subsys/log
tail: unrecognized file system type 0x62656570 for ‘/config/subsys/log’. 
please report this to bug-coreutils@gnu.org. reverting to polling