1. 52a5f97 kconfig: add CONFIG_SYS_{ARCH, CPU, ...} type def to arch/Kconfig by Masahiro Yamada · Sun Sep 14 03:01:48 2014 +0900
  2. 804bc5e kconfig: add basic Kconfig files by Masahiro Yamada · Wed Jul 30 14:08:15 2014 +0900