BDEV_I
bdev_file->private_data = BDEV_I(bdev_file->f_mapping->host);
kmem_cache_free(bdev_cachep, BDEV_I(inode));
return &BDEV_I(inode)->bdev;
bdev = &BDEV_I(inode)->bdev;
return bdev_file->private_data == BDEV_I(bdev_file->f_mapping->host);