block_dev: convert to new aops

	return block_read_full_page(page, blkdev_get_block);

}

static int blkdev_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)

static int blkdev_write_begin(struct file *file, struct address_space *mapping,

			loff_t pos, unsigned len, unsigned flags,

			struct page **pagep, void **fsdata)

{

	return block_prepare_write(page, from, to, blkdev_get_block);

	*pagep = NULL;

	return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,

				blkdev_get_block);

}

static int blkdev_commit_write(struct file *file, struct page *page, unsigned from, unsigned to)

static int blkdev_write_end(struct file *file, struct address_space *mapping,

			loff_t pos, unsigned len, unsigned copied,

			struct page *page, void *fsdata)

{

	return block_commit_write(page, from, to);

	int ret;

	ret = block_write_end(file, mapping, pos, len, copied, page, fsdata);

	unlock_page(page);

	page_cache_release(page);

	return ret;

}

/*

	.readpage	= blkdev_readpage,

	.writepage	= blkdev_writepage,

	.sync_page	= block_sync_page,

	.prepare_write	= blkdev_prepare_write,

	.commit_write	= blkdev_commit_write,

	.write_begin	= blkdev_write_begin,

	.write_end	= blkdev_write_end,

	.writepages	= generic_writepages,

	.direct_IO	= blkdev_direct_IO,

};