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block: Use pointer to backing_dev_info from request_queue

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We will want to have struct backing_dev_info allocated separately from
struct request_queue. As the first step add pointer to backing_dev_info
to request_queue and convert all users touching it. No functional
changes in this patch.

Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jan Kara 2017-02-02 15:56:50 +01:00 • committed by Jens Axboe
commit dc3b17cc8b
33 changed files with 90 additions and 86 deletions
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4
mm/page-writeback.c
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@ -1988,11 +1988,11 @@ void laptop_mode_timer_fn(unsigned long data)
* We want to write everything out, not just down to the dirty
* threshold
*/
if (!bdi_has_dirty_io(&q->backing_dev_info))
if (!bdi_has_dirty_io(q->backing_dev_info))
return;
rcu_read_lock();
list_for_each_entry_rcu(wb, &q->backing_dev_info.wb_list, bdi_node)
list_for_each_entry_rcu(wb, &q->backing_dev_info->wb_list, bdi_node)
if (wb_has_dirty_io(wb))
wb_start_writeback(wb, nr_pages, true,
WB_REASON_LAPTOP_TIMER);