[PATCH 0/2] xfs: readonly handling changes

[Eric Sandeen <sandeen@redhat.com>]

A couple of changes to how xfs behaves w.r.t. readonly
mounts.

1) remove readonly checks from xfs_release and xfs_inactive paths
2) write unmount record even for RO mounts (which may have done recovery)

Both of these stem from the fact that a readonly mount (as opposed to a
ro,norecovery mount) is /not/ guaranteed to do no writes to the block
device; in fact we do that straightaway when we replay the log.  Other
"OMG don't write!" leftovers linger, and cause issues as described
in the following 2 patches.

Dave suggested grand plans for coalescing more of this into common
paths ala remount handling, i.e. a RO mount gets mounted RW and then
just goes through the same transition to RO at the end, but I haven't
put all that together yet, and these patches address a couple bugs in
a more targeted fashion until that can happen.

-Eric