writeback: remove writeback_control.more_io

When wbc.more_io was first introduced, it indicates whether there are
at least one superblock whose s_more_io contains more IO work. Now with
the per-bdi writeback, it can be replaced with a simple b_more_io test.

Acked-by: Jan Kara <jack@suse.cz>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index d8e96a480850..8797b20dd22b 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -46,7 +46,6 @@ struct writeback_control {
         unsigned tagged_writepages:1;   /* tag-and-write to avoid livelock */
         unsigned for_reclaim:1;         /* Invoked from the page allocator */
         unsigned range_cyclic:1;        /* range_start is cyclic */
-        unsigned more_io:1;             /* more io to be dispatched */
 };
 
 /*