tree 6982ffefd0d599cce5b9f9fbcf5fd4d4f5367836
parent ed6b39cc7746fabdd0d01c96afcf60b9544913d3
author Ken Sumrall <ksumrall@android.com> 1310525226 -0700
committer Ken Sumrall <ksumrall@android.com> 1310593061 -0700

Add -o loop= option to mount, and fix error detection in mount and umount

This fixes bug http://b.android.com/18419, which complains about a bogus
error check in the mount command (it also was wrong in the umount command)
and also asks for the mount command to support more than one loopback
device, as mentioned in the FIXME comments in mount.c.  This required some
corresponding changes to umount.c

Change-Id: Ib796c70926395e61557e487bad64984d3295d5f3