1. 8cb5cdd avr32: Retire AVR32 for good by Andy Shevchenko · Wed Jul 05 16:25:22 2017 +0300
  2. 5e7e908 scripts/checkstack.pl: update to get AArch64 port from Linux by Kim Phillips · Wed Jan 28 13:15:01 2015 -0600
  3. 7935a82 Makefile: Move some scripts imported from Linux by Masahiro Yamada · Thu Nov 28 16:29:23 2013 +0900[Renamed from tools/checkstack.pl]
  4. 0819fd8 tools: checkstack.pl from Linux added to tools by Tom Rini · Thu Feb 02 14:07:05 2012 +0000