with block/fragment!=8 may cause bogus
behaviour.  The problem in "ufs_bitmap_search" function, which doesn't work
correctly in "block/fragment!=8" case.  The idea is stolen from BSD code.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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