hfs has two dirty bits, but currently OS X uses only one of them, so match its
behaviour, so that a uncleanly unmounted disk can be mounted r/w again, after
it has been checked.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>