[PATCH vfs.all 03/26] block: remove sync_blockdev_range()

[Yu Kuai <yukuai1@xxxxxxxxxxxxxxx>]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

Now that all filesystems stash the bdev file, it's ok to flush the file
mapping directly.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
---
 block/bdev.c           |  7 -------
 fs/btrfs/volumes.c     | 12 +++++++-----
 fs/exfat/fatent.c      |  2 +-
 include/linux/blkdev.h |  1 -
 4 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/block/bdev.c b/block/bdev.c
index c9b056782c96..d53bf2f46b43 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -200,13 +200,6 @@ int sync_blockdev(struct block_device *bdev)
 }
 EXPORT_SYMBOL(sync_blockdev);
 
-int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend)
-{
-	return filemap_write_and_wait_range(bdev->bd_inode->i_mapping,
-			lstart, lend);
-}
-EXPORT_SYMBOL(sync_blockdev_range);
-
 /**
  * bdev_freeze - lock a filesystem and force it into a consistent state
  * @bdev:	blockdevice to lock
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 1dc1f1946ae0..6f130c749dbc 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2050,14 +2050,14 @@ static u64 btrfs_num_devices(struct btrfs_fs_info *fs_info)
 }
 
 static void btrfs_scratch_superblock(struct btrfs_fs_info *fs_info,
-				     struct block_device *bdev, int copy_num)
+				     struct file *bdev_file, int copy_num)
 {
 	struct btrfs_super_block *disk_super;
 	const size_t len = sizeof(disk_super->magic);
 	const u64 bytenr = btrfs_sb_offset(copy_num);
 	int ret;
 
-	disk_super = btrfs_read_disk_super(bdev, bytenr, bytenr);
+	disk_super = btrfs_read_disk_super(file_bdev(bdev_file), bytenr, bytenr);
 	if (IS_ERR(disk_super))
 		return;
 
@@ -2065,7 +2065,8 @@ static void btrfs_scratch_superblock(struct btrfs_fs_info *fs_info,
 	folio_mark_dirty(virt_to_folio(disk_super));
 	btrfs_release_disk_super(disk_super);
 
-	ret = sync_blockdev_range(bdev, bytenr, bytenr + len - 1);
+	ret = filemap_write_and_wait_range(bdev_file->f_mapping,
+					   bytenr, bytenr + len - 1);
 	if (ret)
 		btrfs_warn(fs_info, "error clearing superblock number %d (%d)",
 			copy_num, ret);
@@ -2075,15 +2076,16 @@ void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info, struct btrfs_devic
 {
 	int copy_num;
 	struct block_device *bdev = device->bdev;
+	struct file *bdev_file = device->bdev_file;
 
-	if (!bdev)
+	if (!bdev || !bdev_file)
 		return;
 
 	for (copy_num = 0; copy_num < BTRFS_SUPER_MIRROR_MAX; copy_num++) {
 		if (bdev_is_zoned(bdev))
 			btrfs_reset_sb_log_zones(bdev, copy_num);
 		else
-			btrfs_scratch_superblock(fs_info, bdev, copy_num);
+			btrfs_scratch_superblock(fs_info, bdev_file, copy_num);
 	}
 
 	/* Notify udev that device has changed */
diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index 56b870d9cc0d..1c86ec2465b7 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -296,7 +296,7 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
 	}
 
 	if (IS_DIRSYNC(dir))
-		return sync_blockdev_range(sb->s_bdev,
+		return filemap_write_and_wait_range(sb->s_bdev_file->f_mapping,
 				EXFAT_BLK_TO_B(blknr, sb),
 				EXFAT_BLK_TO_B(last_blknr, sb) - 1);
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 433c880299a6..08d4e6a0940c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1532,7 +1532,6 @@ unsigned int block_size(struct block_device *bdev);
 #ifdef CONFIG_BLOCK
 void invalidate_bdev(struct block_device *bdev);
 int sync_blockdev(struct block_device *bdev);
-int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend);
 void sync_bdevs(bool wait);
 void bdev_statx_dioalign(struct inode *inode, struct kstat *stat);
 void printk_all_partitions(void);
-- 
2.39.2