[PATCH -next 23/29] md: use new apis to suspend array in backlog_store()

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

mddev_create/destroy_serial_pool() will be called from backlog_store(),
and mddev_suspend() will be called later.

Prepare to remove the mddev_suspend() from
mddev_create/destroy_serial_pool().

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 drivers/md/md-bitmap.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 7d21e2a5b06e..b3d701c5c461 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -2537,7 +2537,7 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len)
 	if (backlog > COUNTER_MAX)
 		return -EINVAL;
 
-	rv = mddev_lock(mddev);
+	rv = mddev_suspend_and_lock(mddev);
 	if (rv)
 		return rv;
 
@@ -2562,16 +2562,16 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len)
 	if (!backlog && mddev->serial_info_pool) {
 		/* serial_info_pool is not needed if backlog is zero */
 		if (!mddev->serialize_policy)
-			mddev_destroy_serial_pool(mddev, NULL, false);
+			mddev_destroy_serial_pool(mddev, NULL, true);
 	} else if (backlog && !mddev->serial_info_pool) {
 		/* serial_info_pool is needed since backlog is not zero */
 		rdev_for_each(rdev, mddev)
-			mddev_create_serial_pool(mddev, rdev, false);
+			mddev_create_serial_pool(mddev, rdev, true);
 	}
 	if (old_mwb != backlog)
 		md_bitmap_update_sb(mddev->bitmap);
 
-	mddev_unlock(mddev);
+	mddev_unlock_and_resume(mddev);
 	return len;
 }
 
-- 
2.39.2