[PATCH 22/45] writeback: make bdi_start_background_writeback() take bdi_writeback instead of backing_dev_info
From: Tejun Heo <tj@kernel.org>
Date: 2015-01-06 21:25:59
Also in:
linux-fsdevel, linux-mm, lkml
Subsystem:
filesystems (vfs and infrastructure), memory management, page cache, the rest · Maintainers:
Alexander Viro, Christian Brauner, Andrew Morton, Matthew Wilcox, Linus Torvalds
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 <tj@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Jan Kara <jack@suse.cz> --- fs/fs-writeback.c | 12 ++++++------ include/linux/backing-dev.h | 2 +- mm/page-writeback.c | 4 ++-- 3 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 6ab113b..c209ff1 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c@@ -244,23 +244,23 @@ 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); } /**
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 953fa01..4cdab7c 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h@@ -28,7 +28,7 @@ void bdi_unregister(struct backing_dev_info *bdi); int __must_check bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int); void wb_start_writeback(struct bdi_writeback *wb, long nr_pages, bool range_cyclic, enum wb_reason reason); -void bdi_start_background_writeback(struct backing_dev_info *bdi); +void wb_start_background_writeback(struct bdi_writeback *wb); void wb_workfn(struct work_struct *work); void wb_wakeup_delayed(struct bdi_writeback *wb);
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b250ee2..4cf365c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c@@ -1450,7 +1450,7 @@ static void balance_dirty_pages(struct address_space *mapping, } if (unlikely(!writeback_in_progress(wb))) - bdi_start_background_writeback(bdi); + wb_start_background_writeback(wb); if (!strictlimit) wb_dirty_limits(wb, dirty_thresh, background_thresh,
@@ -1583,7 +1583,7 @@ pause: return; if (nr_reclaimable > background_thresh) - bdi_start_background_writeback(bdi); + wb_start_background_writeback(wb); } static DEFINE_PER_CPU(int, bdp_ratelimits);
--
2.1.0
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