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writeback: make bdi_start_background_writeback() take bdi_writeback instead of backing_dev_info

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bdi_start_background_writeback() currently takes @bdi and kicks the
root wb (bdi_writeback).  In preparation for cgroup writeback support,
make it take wb instead.

This patch doesn't make any functional difference.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Jan Kara <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2015-05-22 17:13:54 -04:00 • committed by Jens Axboe
commit 9ecf4866c0
3 changed files with 9 additions and 9 deletions
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12
fs/fs-writeback.c
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@ -228,23 +228,23 @@ void wb_start_writeback(struct bdi_writeback *wb, long nr_pages,
}
/**
* bdi_start_background_writeback - start background writeback
* @bdi: the backing device to write from
* wb_start_background_writeback - start background writeback
* @wb: bdi_writback to write from
*
* Description:
* This makes sure WB_SYNC_NONE background writeback happens. When
* this function returns, it is only guaranteed that for given BDI
* this function returns, it is only guaranteed that for given wb
* some IO is happening if we are over background dirty threshold.
* Caller need not hold sb s_umount semaphore.
*/
void bdi_start_background_writeback(struct backing_dev_info *bdi)
void wb_start_background_writeback(struct bdi_writeback *wb)
{
/*
* We just wake up the flusher thread. It will perform background
* writeback as soon as there is no other work to do.
*/
trace_writeback_wake_background(bdi);
wb_wakeup(&bdi->wb);
trace_writeback_wake_background(wb->bdi);
wb_wakeup(wb);
}
/*