Goal: linux mainline contains the latest linux-xtensa updates, builds and works.

• compilable with latest GCC
• overlays to cover: FSF, dc232b, more TBD
• tests to pass: builds, boots, LTP
• boards to focus on: ISS, ML605
• configurations: UP, linux-next specific, more TBD

• Prepare for linux-next participation
  • [2/3] Make mainline build for ARCH=xtensa in defconfig, allnoconfig, allmodconfig
    • [+] fix remaining issues with allmodconfig
    • why there's no simdisk in the mainline?
    • qemu needs proper handling for guest ioctls triggered via simcalls
  • [+] Make built images work (qemu, FSF)
• [+] Build userspace
• Automated build/test scripts
  • [+] build/test status/logs
  • expect script to run LTP
• Analyse reference tree
  • proper bugfixes
  • new cores (dc233c, test_hifi_c3, s*)
  • new platforms (lx*, ml605, s*)
  • SMP and its fixes
  • XCC fixes
• Issues