Disk mount flags notification?

[Mike Neuman <fullyarticulate_(_at_)_yahoo_(_dot_)_com>]

  Hello,

  I'm developing a driver for a flash device. The idea
is essentially this:

1) The disk is mounted readonly for normal operation
2) For an update, the disk is:
  mount -u -w /
  then the data is written to a cache (transparently
in the driver), then:
  mount -u -r /
  (which causes the blocks to be written to flash
using a simple wear balancing algorithm)

  The problem is, as far as I can tell, the driver
never gets notified (either through ioctl, open, or
close) when the read/write status of the mount has
changed.

  Is there any way for a driver to find out when the
mount has changed flags?

  I've also looked at MNT_RELOAD, but it seems that
just reloads the disk label.
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