zfs-dkms: support linux >= 6.3

[Andrea Righi]

[Impact]

The current version of zfs-dkms available in lunar fails to build with kernels >= 6.3.

[Test case]

$ apt install zfs-dkms

[Fix]

Resync with zfs version in Debian (2.1.1) and apply the usual Ubuntu specific changes.

[Regression potential]

We may experience zfs regressions due to a new major version, especially on zfs volumes / filesystems created with the previous versions. However this goes in pair with the new major kernel version and we need to upgrade the version of zfs to properly support the new kernels >= 6.3.

[Launchpad Janitor (janitor)]

This bug was fixed in the package zfs-linux - 2.1.99-0ubuntu4

---------------
zfs-linux (2.1.99-0ubuntu4) mantic; urgency=medium

  * Package master snapshot (zfs-2.1.99-1978-g4f583a827e)

zfs-linux (2.1.99-0ubuntu3) mantic; urgency=medium

  * Fixup symbols for non-amd64 arches.
  * Remove all known zfs kernel modules in the smoke test.

zfs-linux (2.1.99-0ubuntu2) mantic; urgency=medium

  * autopkgtest: skip on secureboot enabled machines.

zfs-linux (2.1.99-0ubuntu1) mantic; urgency=medium

  * Package master snapshot (zfs-2.1.99-1955-gad0a554614)
  * Adds support for v6.3+ LP: #2018716
  * Use native packaging without a tarball.
  * Lots of symbols dropped and changed:
    - however these are due to fvisibility=hidden
    - they should be internal-only
    - and not used externally
    - thus updating symbols without ABI bumps
    - fingers-crossed

 -- Dimitri John Ledkov <email address hidden> Thu, 01 Jun 2023 16:13:59 +0100