[PATCH] embarrassing 2.5.31 small bug fix for blkdev_reread_part()

Here is a trivial bug fix for blkdev_reread_part() in 2.5.31.
Without this fix,  "fdisk" hangs with following messages:

	Calling ioctl() to re-read partition table.

	WARNING: Re-reading the partition table failed with error 16:
			Device or resource busy.
	The kernel still uses the old table.
	The new table will be used at the next reboot.

fs/block_dev.c

@@ -797,7 +797,7 @@ static int blkdev_reread_part(struct block_device *bdev)
 	part = disk->part + minor(dev) - disk->first_minor;
 	if (!capable(CAP_SYS_ADMIN))
 		return -EACCES;
-	if (down_trylock(&bdev->bd_sem));
+	if (down_trylock(&bdev->bd_sem))
 		return -EBUSY;
 	if (bdev->bd_part_count) {
 		up(&bdev->bd_sem);