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writeback: remove wb_list

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The wb_list member of struct backing_device_info always has exactly one
element.  Just use the direct bdi->wb pointer instead and simplify some
code.

Also remove bdi_task_init which is now trivial to prepare for the next
patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Christoph Hellwig 2010-06-19 23:08:06 +02:00 • committed by Jens Axboe
parent 4c4762d10f
commit c1955ce32f
3 changed files with 32 additions and 60 deletions
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4
fs/fs-writeback.c
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@ -73,9 +73,9 @@ static void bdi_queue_work(struct backing_dev_info *bdi,
* If the default thread isn't there, make sure we add it. When
* it gets created and wakes up, we'll run this work.
*/
if (unlikely(list_empty_careful(&bdi->wb_list)))
if (unlikely(!bdi->wb.task)) {
wake_up_process(default_backing_dev_info.wb.task);
else {
} else {
struct bdi_writeback *wb = &bdi->wb;
if (wb->task)