set_blocksize
EXPORT_SYMBOL(set_blocksize);
if (set_blocksize(sb->s_bdev_file, size))
return set_blocksize(file, n);
ret = set_blocksize(excl_file, n);
set_blocksize(bdev_file, BTRFS_BDEV_BLOCKSIZE);
set_blocksize(device->bdev_file, BTRFS_BDEV_BLOCKSIZE);
ret = set_blocksize(*bdev_file, BTRFS_BDEV_BLOCKSIZE);
set_blocksize(bdev_file, blocksize);
int set_blocksize(struct file *file, int size);