[linux-next:master 5843/7856] depmod: ERROR: Cycle detected: mtd -> mtd_virt_concat -> mtd

[linux-next:master 5843/7856] depmod: ERROR: Cycle detected: mtd -> mtd_virt_concat -> mtd

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   5f540c4aade9f1d58fb7b9490b4b7d5214ec9746
commit: c64295ea28808590b15341f4f8065c886a2bb372 [5843/7856] mtd: concat: Set virtual concatenation to tristate
config: x86_64-randconfig-006-20250911 (https://download.01.org/0day-ci/archive/20250911/202509110504.JZKrtqy3-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250911/202509110504.JZKrtqy3-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509110504.JZKrtqy3-lkp@intel.com/

All errors (new ones prefixed by >>):

>> depmod: ERROR: Cycle detected: mtd -> mtd_virt_concat -> mtd
   depmod: ERROR: Found 2 modules in dependency cycles!
   make[3]: *** [scripts/Makefile.modinst:132: depmod] Error 1 shuffle=3628295961
   make[3]: Target '__modinst' not remade because of errors.
   make[2]: *** [Makefile:1917: modules_install] Error 2 shuffle=3628295961
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=3628295961
   make[1]: Target 'modules_install' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=3628295961
   make: Target 'modules_install' not remade because of errors.

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [linux-next:master 5843/7856] depmod: ERROR: Cycle detected: mtd -> mtd_virt_concat -> mtd

[Miquel Raynal]

Hi,

On 11/09/2025 at 05:51:22 +08, kernel test robot <lkp@intel.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   5f540c4aade9f1d58fb7b9490b4b7d5214ec9746
> commit: c64295ea28808590b15341f4f8065c886a2bb372 [5843/7856] mtd: concat: Set virtual concatenation to tristate
> config: x86_64-randconfig-006-20250911 (https://download.01.org/0day-ci/archive/20250911/202509110504.JZKrtqy3-lkp@intel.com/config)
> compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250911/202509110504.JZKrtqy3-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202509110504.JZKrtqy3-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>>> depmod: ERROR: Cycle detected: mtd -> mtd_virt_concat -> mtd
>    depmod: ERROR: Found 2 modules in dependency cycles!

Gasp. Well I can indeed reproduce this problem, which means we actually
need to include the content of the virt-concat.c file into the core, not
as a separate lib. This requires reworking a bit the init steps.

As we are approaching the merge window I will just drop this series for
now.

Thanks,
Miquèl