Description of Problem:
mistakenly ran mkinitrd as normal user first time, got an error message that
didn't sound like "permission denied", which was what I expected.
jmm@jmm:/home/jmm> mkinitrd /boot/initrd-2.4.7-6.img 2.4.7-6
All of your loopback devices are in use!
jmm@jmm:/home/jmm> sudo mkinitrd /boot/initrd-2.4.7-6.img 2.4.7-6
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. run mkinitrd as normal user
loopback devices in use message
permission denied error message
added better error to mkinitrd 3.3