[PATCH 1/4] writeback: weed out unneeded code

[Artem Bityutskiy <dedekind1@gmail.com>]

From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

The only user of 'bdi_add_to_pending()' is the default BDI forker
task ('bdi_forker_task()'). And 'bdi_add_to_pending()' wakes up
the forker BDI task, i.e., itself, which is unnecessary. The patch
weeds out the unneeded 'wake_up_process()' call.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
---
 mm/backing-dev.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index ac78a33..ff5669a 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -421,12 +421,6 @@ static void bdi_add_to_pending(struct rcu_head *head)
 	spin_lock(&bdi_lock);
 	list_add_tail(&bdi->bdi_list, &bdi_pending_list);
 	spin_unlock(&bdi_lock);
-
-	/*
-	 * We are now on the pending list, wake up bdi_forker_task()
-	 * to finish the job and add us back to the active bdi_list
-	 */
-	wake_up_process(default_backing_dev_info.wb.task);
 }
 
 /*
-- 
1.7.1.1