A sync of raid5 usually ignore blocks which the bitmap says are in-sync.  But
a user-request check or repair should not ignore these.
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>