writeback: remove unused function parameter

The parameter `struct bdi_writeback *wb` is not been used in the
function body.  Remove it.

Link: http://lkml.kernel.org/r/1509685485-15278-1-git-send-email-wanglong19@meituan.com
Signed-off-by: Wang Long <wanglong19@meituan.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 05313f402ba8..8a1551154285 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1545,7 +1545,7 @@ static inline void wb_dirty_limits(struct dirty_throttle_control *dtc)
          * actually dirty; with m+n sitting in the percpu
          * deltas.
          */
-        if (dtc->wb_thresh < 2 * wb_stat_error(wb)) {
+        if (dtc->wb_thresh < 2 * wb_stat_error()) {
                 wb_reclaimable = wb_stat_sum(wb, WB_RECLAIMABLE);
                 dtc->wb_dirty = wb_reclaimable + wb_stat_sum(wb, WB_WRITEBACK);
         } else {
@@ -1803,7 +1803,7 @@ pause:
                  * more page. However wb_dirty has accounting errors.  So use
                  * the larger and more IO friendly wb_stat_error.
                  */
-                if (sdtc->wb_dirty <= wb_stat_error(wb))
+                if (sdtc->wb_dirty <= wb_stat_error())
                         break;
 
                 if (fatal_signal_pending(current))