md/md-bitmap: merge md_bitmap_set_pages() into struct bitmap_operations

o that the implementation won't be exposed, and it'll be possible
o invent a new bitmap by replacing bitmap_operations.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-39-yukuai1@huaweicloud.comSigned-off-by: Song Liu <song@kernel.org>

drivers/md/md-bitmap.c

@@ -2132,11 +2132,10 @@ static int bitmap_copy_from_slot(struct mddev *mddev, int slot, sector_t *low,
 	return rv;
 }
 
-void md_bitmap_set_pages(struct bitmap *bitmap, unsigned long pages)
+static void bitmap_set_pages(struct bitmap *bitmap, unsigned long pages)
 {
 	bitmap->counts.pages = pages;
 }
-EXPORT_SYMBOL_GPL(md_bitmap_set_pages);
 
 static int bitmap_get_stats(struct bitmap *bitmap, struct md_bitmap_stats *stats)
 {
@@ -2782,6 +2781,7 @@ static struct bitmap_operations bitmap_ops = {
 	.sync_with_cluster	= bitmap_sync_with_cluster,
 	.get_from_slot		= bitmap_get_from_slot,
 	.copy_from_slot		= bitmap_copy_from_slot,
+	.set_pages		= bitmap_set_pages,
 };
 
 void mddev_set_bitmap_ops(struct mddev *mddev)

drivers/md/md-bitmap.h

@@ -279,6 +279,7 @@ struct bitmap_operations {
 	struct bitmap *(*get_from_slot)(struct mddev *mddev, int slot);
 	int (*copy_from_slot)(struct mddev *mddev, int slot, sector_t *lo,
 			      sector_t *hi, bool clear_bits);
+	void (*set_pages)(struct bitmap *bitmap, unsigned long pages);
 };
 
 /* the bitmap API */
@@ -286,7 +287,6 @@ void mddev_set_bitmap_ops(struct mddev *mddev);
 
 /* these are exported */
 
-void md_bitmap_set_pages(struct bitmap *bitmap, unsigned long pages);
 void md_bitmap_free(struct bitmap *bitmap);
 void md_bitmap_wait_behind_writes(struct mddev *mddev);
 

drivers/md/md-cluster.c

@@ -1192,7 +1192,7 @@ static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsiz
 		bm_lockres->flags |= DLM_LKF_NOQUEUE;
 		rv = dlm_lock_sync(bm_lockres, DLM_LOCK_PW);
 		if (!rv)
-			md_bitmap_set_pages(bitmap, my_pages);
+			mddev->bitmap_ops->set_pages(bitmap, my_pages);
 		lockres_free(bm_lockres);
 
 		if (my_pages != stats.pages)