[linux-next:master 1815/7063] ld.lld: error: undefined symbol: devm_cxl_probe_mem

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   1a1757b76427f6201bfe0bf1bea9f7574f332a93
commit: 0418860ef2ca8ab4e696ce3913fd76660c881c0e [1815/7063] sfc: obtain and map cxl range using devm_cxl_probe_mem
config: s390-randconfig-002-20260717 (https://download.01.org/0day-ci/archive/20260717/[email protected]/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260717/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: devm_cxl_probe_mem
   >>> referenced by efx_cxl.c
   >>>               drivers/net/ethernet/sfc/efx_cxl.o:(efx_cxl_init) in archive vmlinux.a

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