1. 10e4779 SPDX: Convert all of our single license tags to Linux Kernel style by Tom Rini · Sun May 06 17:58:06 2018 -0400
  2. 65b905b common: Make sure arch-specific map_sysmem() is defined by Joe Hershberger · Sun Mar 22 17:08:59 2015 -0500
  3. 4dc47ca Add an I/O tracing feature by Simon Glass · Wed Jun 11 23:29:41 2014 -0600