bdput(bdev); bdput(bdev);
md->frozen_bdev = NULL;
static int __unlock_fs(struct mapped_device *md){	struct block_device *bdev;	if (!test_and_clear_bit(DMF_FS_LOCKED, &md->flags))		return 0;	bdev = bdget_disk(md->disk, 0);	if (!bdev) {		DMWARN("bdget failed in __unlock_fs");		return -ENOMEM;	}	thaw_bdev(bdev, md->frozen_sb);	md->frozen_sb = NULL;	bdput(bdev);	bdput(bdev);	return 0;}