[SRU][R/S][PATCH v3 0/1] UBUNTU: SAUCE: Create a linux-main-modules dependency toggle

[Alessio Faina]

Buglink: https://bugs.launchpad.net/bugs/2166181

[ Impact ]

When linux-main-modules has been introduced, it added a forced
dependency on zfs; the module is not built by test servers and leave
developers in a bad state needing to build the module manually and
installing it. This patch is a proposal to create a toggle to remove the
dependency for test servers.

[ Fix ]

The fix is to add a do_linux_main_modules_depends variable in
0-common-vars.mk that can be externally triggered.
This will need a patch to the test servers to set the variable to false
when building the kernel.

[ Testing ]

Testing will check that not passing the variable to the build will
produce a kernel with the dependency enabled, while running it in a way
like the following one
do_linux_main_modules_depends=false dpkg-buildpackage -us -uc -b
will produce a kernel without the linux-main-modules dependencies.

Tested on the following kernels:
   - R/7.0.0-31
	 - S/7.1.3

[ What could go wrong ]

Canonical would produce one kernel with a dependency to lmm (i.e. zfs)
for production and one with no dependencies. This should be a small
impact as the module can be separately built and installed by a
developer in case of need.

[ History ]

v3: - Added stonking as additional target
		- Added missing buglink
    - Added debug logs in case the variable is set to FALSE and lmm is
			disabled
v2: https://lists.ubuntu.com/archives/kernel-team/2026-September/171430.html
    - Added comments in variant files to remind that the variable is used
			to toggle the dependency on linux-main-modules.
v1: https://lists.ubuntu.com/archives/kernel-team/2026-August/171304.html
    - Initial draft

Alessio Faina (1):
  UBUNTU: [packaging] Create a linux-main-modules dependency toggle

 debian.master/control.d/vars.generic     |  2 ++
 debian.master/control.d/vars.generic-64k |  2 ++
 debian/rules.d/0-common-vars.mk          | 11 +++++++++++
 debian/rules.d/1-maintainer.mk           |  1 +
 debian/scripts/control-create            |  5 +++++
 5 files changed, 21 insertions(+)

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2.43.0