[Bug 1459871] Re: arm64 images built w/ setjmp module fail w/ license error

[dann frazier]

I verified that I can successfully netboot from a MAAS server when
setjmp is loaded (verified by lsmod from the grub prompt).

** Tags removed: verification-needed
** Tags added: verification-done

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https://bugs.launchpad.net/bugs/1459871

Title:
  arm64 images built w/ setjmp module fail w/ license error

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2 source package in Trusty:
  Fix Committed
Status in grub2 source package in Vivid:
  Fix Committed
Status in grub2 source package in Wily:
  Fix Committed
Status in grub2 source package in Xenial:
  Fix Released

Bug description:
  [Impact]
  Any ARM64 GRUB image that includes the setjmp module will fail, reporting an "incompatible license" error. Ubuntu doesn't normally include this module in most images. The one exception I know of is MAAS which, by default, includes all modules when generating EFI images. MAAS currently has a hack to blacklist setjmp on arm64 because a fix wasn't available at the time - but I fear other users will try to do the same thing and hit this issue which can be difficult to track down.

  [Test Case]
  PXE boot a grub image on arm64 that includes the setjmp module:

  $ grub-mkimage -v -o grubaa64.efi -O arm64-efi -d
  /usr/lib/grub/arm64-efi setjmp

  [Regression Risk]
  The patch merely adds a license section to the module and it has been tested to work.

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