[PATCH 2/4] writeback: harmonize writeback threads and tasks - 1

[Artem Bityutskiy <dedekind1@gmail.com>]

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

The write-back code mixes words "thread" and "task" for the
same things - this is not a problem, but this is still an
inconsistency which makes it a bit difficult to read the code.
It is better to use term "thread" consistently everywhere.

This patch renames:

'bdi_add_default_flusher_task()' -> 'bdi_add_default_flusher_thread()'
'bdi_forker_task()' -> 'bdi_forker_thread()'

This is just more consistent, because the per-bdi flushers are
'bdi_writeback_thread()'.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
---
 mm/backing-dev.c |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index ff5669a..431486e 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -50,7 +50,7 @@ static struct timer_list sync_supers_timer;
 static int bdi_sync_supers(void *);
 static void sync_supers_timer_fn(unsigned long);
 
-static void bdi_add_default_flusher_task(struct backing_dev_info *bdi);
+static void bdi_add_default_flusher_thread(struct backing_dev_info *bdi);
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
@@ -279,7 +279,7 @@ static void bdi_flush_io(struct backing_dev_info *bdi)
 }
 
 /*
- * kupdated() used to do this. We cannot do it from the bdi_forker_task()
+ * kupdated() used to do this. We cannot do it from the bdi_forker_thread()
  * or we risk deadlocking on ->s_umount. The longer term solution would be
  * to implement sync_supers_bdi() or similar and simply do it from the
  * bdi writeback tasks individually.
@@ -318,7 +318,7 @@ static void sync_supers_timer_fn(unsigned long unused)
 	bdi_arm_supers_timer();
 }
 
-static int bdi_forker_task(void *ptr)
+static int bdi_forker_thread(void *ptr)
 {
 	struct bdi_writeback *me = ptr;
 
@@ -354,7 +354,7 @@ static int bdi_forker_task(void *ptr)
 			    !bdi_has_dirty_io(bdi))
 				continue;
 
-			bdi_add_default_flusher_task(bdi);
+			bdi_add_default_flusher_thread(bdi);
 		}
 
 		set_current_state(TASK_INTERRUPTIBLE);
@@ -427,7 +427,7 @@ static void bdi_add_to_pending(struct rcu_head *head)
  * Add the default flusher task that gets created for any bdi
  * that has dirty data pending writeout
  */
-void static bdi_add_default_flusher_task(struct backing_dev_info *bdi)
+void static bdi_add_default_flusher_thread(struct backing_dev_info *bdi)
 {
 	if (!bdi_cap_writeback_dirty(bdi))
 		return;
@@ -441,8 +441,8 @@ void static bdi_add_default_flusher_task(struct backing_dev_info *bdi)
 	/*
 	 * Check with the helper whether to proceed adding a task. Will only
 	 * abort if we two or more simultanous calls to
-	 * bdi_add_default_flusher_task() occured, further additions will block
-	 * waiting for previous additions to finish.
+	 * bdi_add_default_flusher_thread() occured, further additions will
+	 * block waiting for previous additions to finish.
 	 */
 	if (!test_and_set_bit(BDI_pending, &bdi->state)) {
 		list_del_rcu(&bdi->bdi_list);
@@ -500,7 +500,7 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
 	if (bdi_cap_flush_forker(bdi)) {
 		struct bdi_writeback *wb = &bdi->wb;
 
-		wb->task = kthread_run(bdi_forker_task, wb, "bdi-%s",
+		wb->task = kthread_run(bdi_forker_thread, wb, "bdi-%s",
 						dev_name(dev));
 		if (IS_ERR(wb->task)) {
 			wb->task = NULL;
-- 
1.7.1.1