There is no need to export struct mb_cache outside mbcache.c.  Move struct
mb_cache to fs/mbcache.c and remove the superfluous struct
mb_cache_entry_index declaration.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>