linux-kernel - [PATCH RFC -next v2 38/41] md/md-bitmap: merge md_bitmap_free() into bitmap

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Message-Id: <20240814071113.346781-39-yukuai1@huaweicloud.com>
Date: Wed, 14 Aug 2024 15:11:10 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: mariusz.tkaczyk@...ux.intel.com,
	hch@...radead.org,
	song@...nel.org
Cc: linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org,
	yukuai3@...wei.com,
	yukuai1@...weicloud.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com
Subject: [PATCH RFC -next v2 38/41] md/md-bitmap: merge md_bitmap_free() into bitmap_operations

From: Yu Kuai <yukuai3@...wei.com>

So 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@...wei.com>
---
 drivers/md/md-bitmap.c  |  7 ++-----
 drivers/md/md-bitmap.h  |  3 +--
 drivers/md/md-cluster.c | 12 ++++++------
 3 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index f53e3a62c4e2..eb7c5e552acf 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -1828,10 +1828,7 @@ static void bitmap_flush(struct mddev *mddev)
 	bitmap_update_sb(bitmap);
 }
 
-/*
- * free memory that was allocated
- */
-void md_bitmap_free(struct bitmap *bitmap)
+static void md_bitmap_free(struct bitmap *bitmap)
 {
 	unsigned long k, pages;
 	struct bitmap_page *bp;
@@ -1865,7 +1862,6 @@ void md_bitmap_free(struct bitmap *bitmap)
 	kfree(bp);
 	kfree(bitmap);
 }
-EXPORT_SYMBOL(md_bitmap_free);
 
 void md_bitmap_wait_behind_writes(struct mddev *mddev)
 {
@@ -2771,6 +2767,7 @@ static struct bitmap_operations bitmap_ops = {
 	.get_from_slot		= bitmap_get_from_slot,
 	.copy_from_slot		= bitmap_copy_from_slot,
 	.set_pages		= bitmap_set_pages,
+	.free			= md_bitmap_free,
 };
 
 void mddev_set_bitmap_ops(struct mddev *mddev)
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index d5bbadc1f6fd..d0037665a4dc 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -279,14 +279,13 @@ struct bitmap_operations {
 	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);
+	void (*free)(struct bitmap *bitmap);
 };
 
 /* the bitmap API */
 void mddev_set_bitmap_ops(struct mddev *mddev);
 
 /* these are exported */
-
-void md_bitmap_free(struct bitmap *bitmap);
 void md_bitmap_wait_behind_writes(struct mddev *mddev);
 
 static inline u64 md_bitmap_events_cleared(struct mddev *mddev)
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 64a4ccbe68c0..da94f7251da7 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -1200,12 +1200,12 @@ static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsiz
 			 * can't resize bitmap
 			 */
 			goto out;
-		md_bitmap_free(bitmap);
+		mddev->bitmap_ops->free(bitmap);
 	}
 
 	return 0;
 out:
-	md_bitmap_free(bitmap);
+	mddev->bitmap_ops->free(bitmap);
 	update_bitmap_size(mddev, oldsize);
 	return -1;
 }
@@ -1248,7 +1248,7 @@ static int cluster_check_sync_size(struct mddev *mddev)
 		bm_lockres = lockres_init(mddev, str, NULL, 1);
 		if (!bm_lockres) {
 			pr_err("md-cluster: Cannot initialize %s\n", str);
-			md_bitmap_free(bitmap);
+			mddev->bitmap_ops->free(bitmap);
 			return -1;
 		}
 		bm_lockres->flags |= DLM_LKF_NOQUEUE;
@@ -1259,17 +1259,17 @@ static int cluster_check_sync_size(struct mddev *mddev)
 
 		rv = mddev->bitmap_ops->get_stats(bitmap, &stats);
 		if (rv) {
-			md_bitmap_free(bitmap);
+			mddev->bitmap_ops->free(bitmap);
 			return rv;
 		}
 
 		if (sync_size == 0) {
 			sync_size = stats.sync_size;
 		} else if (sync_size != stats.sync_size) {
-			md_bitmap_free(bitmap);
+			mddev->bitmap_ops->free(bitmap);
 			return -1;
 		}
-		md_bitmap_free(bitmap);
+		mddev->bitmap_ops->free(bitmap);
 	}
 
 	return (my_sync_size == sync_size) ? 0 : -1;
-- 
2.39.2