grub2: cherry-pick support for ZFS pool feature flags, bugfixes

[Hajo Möller]

Now that native ZFS becomes available in Ubuntu we should cherry-pick
patches from grub2 upstream, which add support for booting off zpools
with all (current) feature flags enabled/active and fix some issues and
memory leaks.

I'll quote my posting to bugs.debian.org:

Dear Maintainers,

as of May 2015 grub2 upstream includes patches by Toomas Soome to
support OpenZFS pools with feature flags, which fixes booting off ZFS
rpools. The relevant upstream logs:
http://git.savannah.gnu.org/cgit/grub.git/log/include/grub/zfs
http://git.savannah.gnu.org/cgit/grub.git/log/grub-core/fs/zfs

As I do not know whether Toomas' patches depend on intermediate commits
I propose to cherry-pick all new commits to "include/grub/zfs" and
"grub-core/fs/zfs". Even if the patches do not depend on previous
commits it would be nice to include them as fixes to memory leaks and
other issues.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package grub2 - 2.02~beta2-35

---------------
grub2 (2.02~beta2-35) unstable; urgency=medium

  * Apply the arm64 -mpc-relative-literal-loads workaround in configure
    rather than in debian/rules, to cope with toolchains that don't have the
    relevant patch applied.

 -- Colin Watson <email address hidden> Fri, 22 Jan 2016 11:02:10 +0000