--- 766b43e12a97c1b6bcf5170da8f02216694adbd5
+++ 61b99c3f5c4b545eb5ae9cfe1f88a2d137b3c209
@@ -624,26 +624,6 @@ void add_disk(struct gendisk *disk)
 				   "bdi");
 	WARN_ON(retval);
 
-	/*
-	 * Limit default readahead size for small devices.
-	 *        disk size    readahead size
-	 *               1M                8k
-	 *               4M               16k
-	 *              16M               32k
-	 *              64M               64k
-	 *             256M              128k
-	 *               1G              256k
-	 *               4G              512k
-	 *              16G             1024k
-	 *              64G             2048k
-	 *             256G             4096k
-	 */
-	if (get_capacity(disk)) {
-		unsigned long size = get_capacity(disk) >> 9;
-		size = 1UL << (ilog2(size) / 2);
-		bdi->ra_pages = min(bdi->ra_pages, size);
-	}
-
 	disk_add_events(disk);
 }
 EXPORT_SYMBOL(add_disk);