> What the... Wait a bit. How and when can ->b_list become *not*
>corrsponding to the list where the buffer sits, anyway?
Think if nextbh is a clean buffer not belonging to the dev that is
changing blocksize.
Think if while we sleep in wait_on_buffer(bh), bhnext get marked dirty by
another fs and so if it gets refiled to the BH_DIRTY lru list.
Andrea Arcangeli
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