have the c->ro_mount
flag set. The fix is very simple - just clear the flag before
starting re-mounting R/W.

These warnings are caused by the following commit:
2ef13294d29bcfb306e0d360f1b97f37b647b0c0

For -stable guys: this bug was introduced in 2.6.38, this is materieal
for 2.6.38-stable.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: stable@kernel.org [2.6.38]
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