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writeback: make writeback_in_progress() take bdi_writeback instead of backing_dev_info

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writeback_in_progress() currently takes @bdi and returns whether
writeback is in progress on its root wb (bdi_writeback).  In
preparation for cgroup writeback support, make it take wb instead.
While at it, make it an inline function.

This patch doesn't make any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Tejun Heo
2015-05-22 17:13:53 -04:00
committed by Jens Axboe
parent a06fd6b102
commit bc05873dcc
3 changed files with 14 additions and 17 deletions
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4
mm/page-writeback.c
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@@ -1455,7 +1455,7 @@ static void balance_dirty_pages(struct address_space *mapping,
break;
}
if (unlikely(!writeback_in_progress(bdi)))
if (unlikely(!writeback_in_progress(wb)))
bdi_start_background_writeback(bdi);
if (!strictlimit)
@@ -1573,7 +1573,7 @@ pause:
if (!dirty_exceeded && wb->dirty_exceeded)
wb->dirty_exceeded = 0;
if (writeback_in_progress(bdi))
if (writeback_in_progress(wb))
return;
/*