Now that the LRU to add a page to is decided at LRU-add time, remove the
misleading lru parameter from __pagevec_lru_add. A consequence of this is
that the pagevec_lru_add_file, pagevec_lru_add_anon and similar helpers
are misleading as the caller no longer has direct control over what LRU
the page is added to. Unused helpers are removed by this patch and existing
users of pagevec_lru_add_file() are converted to use lru_cache_add_file()
directly and use the per-cpu pagevecs instead of creating their own pagevec.
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>