From: Yu Kuai <yukuai3@huawei.com>

Prepare to support discard in new md bitmap.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/md/md-bitmap.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index d3d50629af91..c3fc051c88e9 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -94,6 +94,11 @@ struct bitmap_operations {
 			  unsigned long sectors);
 	void (*endwrite)(struct mddev *mddev, sector_t offset,
 			 unsigned long sectors);
+	int (*start_discard)(struct mddev *mddev, sector_t offset,
+			     unsigned long sectors);
+	void (*end_discard)(struct mddev *mddev, sector_t offset,
+			    unsigned long sectors);
+
 	bool (*start_sync)(struct mddev *mddev, sector_t offset,
 			   sector_t *blocks, bool degraded);
 	void (*end_sync)(struct mddev *mddev, sector_t offset, sector_t *blocks);
-- 
2.39.2

On Mon, May 12, 2025 at 09:19:09AM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> Prepare to support discard in new md bitmap.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>