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. 3b787ef ARM: Rework and correct barrier definitions by Tom Rini · Mon Aug 01 18:54:53 2016 -0400
  3. e996bc6 arm/arm64: Move barrier instructions into separate header by Andre Przywara · Thu May 12 12:14:41 2016 +0100