1. ae0ae22 driver/usb: include upper/lower_32_bits() from linux/compat.h by Lijun Pan · Fri Jun 20 12:18:39 2014 -0500
  2. 4912dcc USB: xHCI: Add stack support for xHCI by Vivek Gautam · Sat Sep 14 14:02:45 2013 +0530