[thomas-weissschuh:b4/kunit-kselftests 15/19] ld.lld: error: undefined symbol: shmem_init_fs_context

[thomas-weissschuh:b4/kunit-kselftests 15/19] ld.lld: error: undefined symbol: shmem_init_fs_context

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/kunit-kselftests
head:   d10563e28bf421b3991f2c36e20b2e14e03c8c41
commit: 0387b99af182a8e49e0873834ebe0e226726dcf2 [15/19] kunit: Introduce UAPI testing framework
config: arm-randconfig-002-20250326 (https://download.01.org/0day-ci/archive/20250326/202503262329.c3bCsGbV-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project c2692afc0a92cd5da140dfcdfff7818a5b8ce997)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250326/202503262329.c3bCsGbV-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/202503262329.c3bCsGbV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: shmem_init_fs_context
   >>> referenced by do_mounts.c
   >>>               init/do_mounts.o:(rootfs_init_fs_context) in archive vmlinux.a
   >>> referenced by devtmpfs.c
   >>>               drivers/base/devtmpfs.o:(devtmpfs_init_fs_context) in archive vmlinux.a
   >>> referenced by devtmpfs.c
   >>>               drivers/base/devtmpfs.o:(internal_fs_type) in archive vmlinux.a

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for TMPFS
   Depends on [n]: SHMEM [=n]
   Selected by [y]:
   - KUNIT_UAPI [=y] && KUNIT [=y] && (CC_CAN_LINK_STATIC [=n] || ARCH_HAS_NOLIBC [=y])

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