--- linux-pure/fs/block_dev.c.1	2003-10-24 02:10:36.000000000 +0200
+++ linux-pure/fs/block_dev.c	2003-10-24 02:12:38.000000000 +0200
@@ -151,9 +151,21 @@
 
 static int blkdev_get_block(struct inode * inode, long iblock, struct buffer_head * bh, int create)
 {
+	unsigned long lblock;
 	if (iblock >= max_block(inode->i_rdev))
 		return -EIO;
 
+	/* 
+	 * are we trying to get_block a partial block at the end of the
+	 * device?  If reading, just return an unmapped hole.  If
+	 * writing send -EIO.
+	 */
+	lblock = i_size_read(inode) >> inode->i_blkbits;
+	if (iblock >= lblock) {
+		if (create)
+			return -EIO;
+		return 0;
+	}
 	bh->b_dev = inode->i_rdev;
 	bh->b_blocknr = iblock;
 	bh->b_state |= 1UL << BH_Mapped;