[PATCH RFC -next 05/26] md/md-bitmap: merge md_bitmap_flush() into bitmap_operations

[Yu Kuai <yukuai1@xxxxxxxxxxxxxxx>]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

So that the implementation won't be exposed, and it'll be possible
to invent a new bitmap by replacing bitmap_operations.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 drivers/md/md-bitmap.c | 3 ++-
 drivers/md/md-bitmap.h | 9 ++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 8aaf0491bf5d..33bcae5594e2 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -1776,7 +1776,7 @@ void md_bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long
 /*
  * flush out any pending updates
  */
-void md_bitmap_flush(struct mddev *mddev)
+static void bitmap_flush(struct mddev *mddev)
 {
 	struct bitmap *bitmap = mddev->bitmap;
 	long sleep;
@@ -2711,6 +2711,7 @@ static struct bitmap_operations bitmap_ops = {
 	.create			= bitmap_create,
 	.load			= bitmap_load,
 	.destroy		= bitmap_destroy,
+	.flush			= bitmap_flush,
 };
 
 void mddev_set_bitmap_ops(struct mddev *mddev)
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index 46db4d8199d8..749351db04d3 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -238,6 +238,7 @@ struct bitmap_operations {
 	struct bitmap* (*create)(struct mddev *mddev, int slot);
 	int (*load)(struct mddev *mddev);
 	void (*destroy)(struct mddev *mddev);
+	void (*flush)(struct mddev *mddev);
 };
 
 /* the bitmap API */
@@ -268,7 +269,13 @@ static inline void md_bitmap_destroy(struct mddev *mddev)
 	mddev->bitmap_ops->destroy(mddev);
 }
 
-void md_bitmap_flush(struct mddev *mddev);
+static inline void md_bitmap_flush(struct mddev *mddev)
+{
+	if (!mddev->bitmap_ops->flush)
+		return;
+
+	mddev->bitmap_ops->flush(mddev);
+}
 
 void md_bitmap_print_sb(struct bitmap *bitmap);
 void md_bitmap_update_sb(struct bitmap *bitmap);
-- 
2.39.2